You are stroking your cat and your hand stops on a lump. It is firm, about the size of a grape, and when you part the fur there is a small hole in the middle of it. Something moves.

Your first instinct will be to squeeze. Every botfly removal video on the internet ends with someone squeezing. Please do not, and this article is mostly about why, because that single decision is what separates a minor vet visit from a genuine emergency.

What a botfly actually is

In North America the botfly that turns up on pets is Cuterebra. The adult is a thick, furry fly that looks more like a bumblebee than a housefly, and it does not bite, feed or sting. It has no mouthparts worth speaking of. The adult’s only job is to mate and lay eggs.

Those eggs go near the burrows and runways of rabbits and rodents, on stones, on stems, along the paths those animals use every day. The eggs then sit and wait. They hatch in response to the warmth of a body passing close by.

That is the whole mechanism, and it explains everything else. The fly is not hunting your pet. It is waiting for a cottontail.

The myth: it did not burrow through your pet’s skin

This is the detail almost every article gets wrong, and getting it right changes how you prevent it.

The larva does not land on your dog and drill inward. According to the Merck Veterinary Manual, larvae enter mainly through the mouth or the nostrils while the animal is grooming or sniffing, and less commonly through an existing open wound. Intact skin is not the doorway.

So the lump on your cat’s neck did not start on your cat’s neck. It started at the nose or the mouth, and the larva then travelled through the body before settling under the skin to finish growing.

Which tells you where the risk really is: a pet with their face down a burrow. Cats that hunt, and dogs that push their nose into holes in a hedge bank, are the ones that get this.

What it looks like on a dog or cat

The textbook lesion is a soft, well defined swelling under the skin, roughly one centimetre across, with a small breathing hole in the centre. That hole is not damage. The larva made it deliberately so it can breathe, and it sits with its rear end against the opening.

In practice, here is the order most owners notice things:

• Matted, damp fur over one spot, because the animal has been grooming or licking it obsessively. On cats this is very often the first sign, before anyone finds a lump.
• A lump that feels soft rather than solid.
• A central hole, sometimes oozing, sometimes with something visibly moving in it.
• Late summer and early autumn. This is a seasonal problem and it clusters there.

Lesions sit mostly around the head, neck and trunk. Pain varies, and when it hurts that is usually a secondary bacterial infection rather than the larva itself.

Worth knowing: the most common thing this gets mistaken for is an abscess or a foreign body, which is reasonable, because that is exactly what it looks like. If your vet finds a larva in it, the diagnosis is settled on the spot.

Why you must not squeeze it

Here is the part that matters.

A mature Cuterebra larva is a fat, stiff, barrel shaped thing covered in rows of dark spines. It is not a maggot you can flick out. It is firmly anchored in a pocket under the skin, and it is wider than the hole it breathes through.

Squeeze it and one of two things happens. Either it holds, and you achieve nothing but pain. Or it ruptures.

Rupturing it is the problem:

• Chronic foreign body reaction. Merck is explicit that squeezing can rupture the larva and cause a chronic foreign body reaction and secondary infection. Spines and fragments left in the tissue keep the wound angry for months.
• Recurrent abscesses. If a lump keeps coming back at a spot that was treated before, that points at larval remnants still in there.
• Anaphylaxis. There are reports of a ruptured larva triggering a severe allergic reaction. Merck describes these as anecdotal rather than common, so this is not a likely outcome, but it is a dangerous one and the risk is entirely avoidable.

Also, do not try to smother it. Vets do use petroleum jelly over the breathing pore, but only for ten to fifteen minutes immediately before grasping the larva with instruments, as a way to bring it within reach. Covering the hole and walking away kills the larva in place, which leaves you with exactly the decomposing foreign body you were trying to avoid.

And do not cut it out at home. The opening has to be enlarged carefully around a parasite you cannot see the shape of.

What the vet actually does

It is a quick procedure and it is not dramatic.

1. The breathing pore is carefully enlarged so the larva can come out without being compressed.
2. If the larva retreats deeper, which it does, petroleum jelly over the pore for ten to fifteen minutes brings it back up within reach.
3. It is grasped with mosquito forceps and lifted out in one piece. Whole is the whole point.
4. The cavity is flushed with sterile saline and any dead tissue trimmed away.
5. The wound is left to heal from the inside out, which can take weeks to months, so do not expect it to close over in days.

Sedation is often used, mostly so the animal stays still rather than because it is agonising. Antibiotics get added when the site is already infected, which is common, because that breathing hole is an open door for bacteria.

The rare version that is genuinely serious

Dogs, cats and ferrets are all accidental hosts, which means the larva has no reliable map inside them. Usually it ends up under the skin and that is the end of it. Occasionally it goes somewhere it should not.

Aberrant migration is documented into the nasal passages, the pharynx, the eyelids and the brain. The signs depend entirely on where it went:

• Airway. Sneezing, upper respiratory signs, and in the worst case difficulty breathing. A larva in the upper airway is an emergency.
• Brain. Depression, lethargy, seizures, blindness, odd mentation, a temperature that is too high or too low.

There is a history that vets specifically ask about in cats with sudden neurological signs: an episode of violent sneezing weeks to months earlier. That is the larva going up the nose. Central nervous system cases cluster between July and September.

Veterinary pathologists and neurologists at Cornell were the first to propose that feline ischemic encephalopathy, a stroke like brain condition in cats, is caused by this migration. The evidence is case series and pathology reviews rather than a controlled study, and the link is considered likely rather than proven, so treat it as a strong suspicion. The supporting pattern is hard to ignore though: where Cuterebra species do not live, the condition is not reported, and the seasons line up.

One breed note. Merck flags Yorkshire Terriers as possibly at increased risk, and able to mount a severe whole body inflammatory response.

None of this is common. The point is simply that “it is only a lump” is the wrong frame if your pet also has neurological or breathing signs.

When to get to a vet urgently

• Any difficulty breathing, or noisy, laboured breathing
• Seizures, collapse, circling, sudden blindness or disorientation
• Sudden unexplained lethargy in a cat that was outdoors in late summer
• A lump that bursts, bleeds heavily or spreads redness and heat across the surrounding skin
• Anything that follows an attempt to squeeze it out at home

Prevention, such as it is

There is no vaccine and no monthly preventive marketed for this, so prevention is behavioural.

• Cut unsupervised outdoor time in late summer and early autumn, which is when infestation peaks.
• Know where the burrows are. If there are rabbit or rodent holes in your garden or on your usual walk, that is the hazard. Blocking access to them does more than anything else.
• Check your pet over after they have been out, the same habit that catches ticks early. Run your hands over the head, neck and body, and pay attention to any patch of fur that is suddenly damp or matted.
• Indoor cats essentially do not get this. Free roaming cats are the ones at risk, and botflies are only one item on a long list of reasons outdoor access costs cats years. We compare the two directly in how long do cats live, indoor versus outdoor.

Obsessive licking at one spot has a long list of possible causes, and most of them are not parasites. We go through them in why is my dog scratching so much.

If what you are looking at is a wound full of small, soft, pale maggots rather than a single large larva in a neat hole, that is a different problem with different urgency, and it is covered in our guide to screwworm in dogs and cats.

Frequently asked questions

Can I pull a botfly out of my dog myself with tweezers?

No. A mature larva is wider than the hole it breathes through and it is anchored in a pocket under the skin, so pulling tends to tear it rather than remove it. A ruptured larva can cause a chronic foreign body reaction, recurrent abscesses and, rarely, a severe allergic reaction. The opening needs enlarging first, which is a vet job.

Can my dog catch a botfly from my cat, or can I catch it?

No. There is no animal to animal or animal to human spread. Every infestation comes from a larva picked up in the environment near rabbit or rodent burrows, so two pets in the same household can both get one from the same garden without either giving it to the other.

What happens if I just leave it alone?

The larva will eventually finish developing and leave on its own to pupate in the soil. The reasons not to wait are that the open breathing hole frequently becomes infected, the animal often traumatises the area by over grooming, and you have no way of knowing whether a second larva went somewhere more dangerous.

Is a botfly lump the same as an abscess?

They look very similar, and an abscess or foreign body is the most common misdiagnosis. The distinguishing feature is the small central breathing pore, and the diagnosis is confirmed by actually finding a larva. If a lump at a previously treated site keeps recurring, that can mean larval fragments were left behind.

Do indoor cats get botflies?

Essentially no. The larva has to be picked up outdoors, near the burrows and runways of rabbits and rodents. Free roaming cats are far more likely to be affected than indoor cats.

Does my pet need treatment if the larva has already gone?

Get the site checked. An empty cavity still needs flushing and often needs antibiotics, because the hole has been open to the environment for weeks. Your vet will also want to be sure nothing was left behind.

The honest summary

A lump with a breathing hole in it, on a dog or cat, in late summer, after time spent outdoors, is very likely a Cuterebra larva. It got in through the nose or the mouth, not through the skin.

Do not squeeze it. Do not smother it and leave it. Do not cut it out. All three carry a real risk of rupturing the larva, and a ruptured larva turns a fifteen minute procedure into weeks of recurrent infection, with a small chance of something far worse.

Take your pet to the vet, mention the breathing hole, and mention anything odd in the preceding weeks, especially a fit of violent sneezing. It is a small problem handled properly and a genuinely nasty one handled with your fingers.

This article is general information and is not a substitute for veterinary advice. If your pet is unwell, contact your vet.

Sources: Merck Veterinary Manual, Cuterebra infestation in dogs and cats; MSD Veterinary Manual, Cuterebra infestation in small animals; Glass and colleagues, Cuterebra myiasis of the central nervous system in cats, 1998; Williams, Summers and de Lahunta, cerebrospinal cuterebriasis and its relationship to feline ischemic encephalopathy, Veterinary Pathology, 1998; University of Guelph Animal Health Laboratory, feline cerebral cuterebriasis.

Most owners meet worms the same way: something that looks like a grain of rice, moving, near the dog’s tail. It is a horrible moment, and the internet’s answer is usually a product link. This guide does the part that gets skipped. What the five worms actually are, what you can and cannot see, which ones can infect you, and why a clear test result does not always mean a clear dog.

Worms in dogs and cats are common, treatable, and mostly preventable. The complication is that the signs overlap with a dozen harmless things, and the most recognisable worm is the one a lab test is most likely to miss.

The five worms worth knowing

Four live in the intestine. The fifth lives in the heart and lungs and is a different problem entirely.

Roundworms are the ones most people picture: long, pale, spaghetti like. Pets pick up the eggs from contaminated soil or faeces. In puppies and kittens they cause the classic pot bellied look, poor growth and digestive upset.

Hookworms are small and bite into the intestinal wall to feed on blood. Larvae get in by mouth or straight through the skin, often the feet. They cause anaemia, skin irritation and, in young animals, serious illness. The Companion Animal Parasite Council calls hookworms one of the most significant intestinal parasites of dogs.

Whipworms live in the large intestine and cause chronic watery or bloody diarrhoea and weight loss. They mostly affect adults rather than puppies.

Tapeworms are flat and segmented, and they are the ones you are most likely to see with your own eyes. More on these below, because they behave differently from the rest.

Heartworm is not an intestinal worm at all. It is carried by mosquitoes, lives in the heart and pulmonary arteries, and causes coughing, exercise intolerance and eventually heart failure. Deworming tablets do nothing for it. It needs its own monthly preventive and its own blood test.

Tapeworm is a flea problem in disguise

This is the single most useful thing in this article, and it is the part that almost never gets said plainly.

The common tapeworm of dogs and cats is Dipylidium caninum, and animals do not catch it from other animals, or from soil, or from each other. They catch it by swallowing an infected flea, usually while grooming. Cornell’s Riney Canine Health Center is explicit that reinfection happens if the source, meaning fleas or rodents, is not dealt with.

So if you find rice grain segments, you have learned two things, not one. Your pet has a tapeworm, and your pet has or recently had fleas. Treat only the worm and it comes back, because the actual supply line is untouched. Our step by step flea guide covers the part that matters, which is the 95% of the flea population living in your carpets rather than on your dog.

The second tapeworm, Taenia, comes from eating rodents. Same logic. The worm is a symptom of the hunting.

What you can actually see

Honest answer: usually very little, and almost never the worm itself.

• Rice grain segments near the anus, in the bedding, or on the stool. Fresh ones move. Dried ones look like sesame seeds. This is tapeworm, and it is the one clear visual sign.
• Scooting, dragging the rear along the floor. Often blamed on worms, and tapeworm segments genuinely do cause it, but full anal glands cause it far more often. Persistent itching and scratching has its own long list of causes, most of them not worms at all, which we go through in why is my dog scratching so much.
• A pot bellied puppy with a dull coat and poor growth, which points at roundworms.
• Chronic diarrhoea, sometimes bloody, which points at whipworms.
• Pale gums and lethargy, which can mean hookworm anaemia and needs a vet quickly in a puppy or kitten.
• Nothing at all. Plenty of infected adult animals look completely well. This is the normal case, not the exception.

Why a clear test does not always mean a clear pet

Diagnosis is usually a faecal flotation, where a stool sample is spun or floated so that any eggs rise and can be counted under a microscope. It works well for roundworm, hookworm and whipworm.

It is unreliable for tapeworm. Cornell notes that faecal testing may find tapeworm eggs but can often miss an active infection. The reason is mechanical: tapeworms shed whole segments containing egg packets rather than releasing loose eggs steadily into the stool, so a given sample may contain none at all.

The practical consequence is worth stating clearly. If you saw rice grain segments, tell your vet you saw them, even if the lab result came back negative. What you saw is better evidence than the test, and treatment is usually given on that basis.

Worms are seasonal, and not in the direction you would guess

Most people assume parasites are a summer problem. Research on US fecal data found that prevalence of both whipworm and roundworm peaked in winter, while hookworm peaked in late summer and early autumn.

Year round prevention exists for this reason. Stopping in October because the weather turned is stopping at the wrong moment for two of the four.

Can you catch worms from your pet

Yes, for some of them, and this is the part worth taking seriously without panicking about it.

Roundworm. The CDC describes toxocariasis as an infection caught from Toxocara, spreading to people from animals, usually dogs or cats. Eggs in animal faeces reach people’s mouths through contaminated dirt or unwashed hands. It does not spread person to person. Young children are at the highest risk, particularly those playing in or eating contaminated soil. In its ocular form it can damage the retina and cost vision, usually in one eye. In its visceral form it moves into organs such as the liver or the central nervous system.

Hookworm. CAPC describes dog hookworms as the most common cause of cutaneous larva migrans in people, where larvae burrow through skin and leave intensely itchy winding tracks. Gardeners, outdoor workers and people who walk barefoot on contaminated sand or soil are the usual cases.

Tapeworm. Human infection with the flea tapeworm is rare, and it requires swallowing an infected flea, which is why the handful of reported cases are mostly in young children.

None of this is a reason to rehome a pet. It is a reason to pick up faeces promptly, wash hands after the garden, keep sandpits covered and keep the dog wormed.

What to actually do

1. Do not guess the worm. Different worms need different drugs. The praziquantel that clears a tapeworm does nothing useful against whipworm, and a general wormer may not cover tapeworm at all. Identify first.
2. Take a stool sample to your vet, and mention anything you saw with your own eyes.
3. Expect the right drug, not the strongest one. Tapeworm is treated with praziquantel, which works quickly, often within a day.
4. Deal with the source. For tapeworm that means fleas, every animal in the house, and the house itself. Skipping this guarantees a repeat.
5. Keep heartworm separate in your head. It is a different parasite with a different route and a different medicine.

How often should pets be tested

CAPC recommends testing for intestinal parasites at least four times in the first year of life, and at least twice a year in adults depending on the animal’s health and lifestyle.

For puppies the schedule starts earlier than most owners expect. CAPC advises treating puppies and their mothers when the young are two, four, six and eight weeks old, then moving on to monthly preventives as soon as the product label allows. The reason is blunt: dormant larvae in the mother are so common that essentially every nursing puppy is assumed to be at risk.

What does not work

Eating grass is often read as a sign of worms too. It is not a reliable one, and the reasons dogs do it are covered in why do dogs eat grass.

Garlic, diatomaceous earth, pumpkin seeds, raw carrot and apple cider vinegar are all recommended online as natural wormers. None of them clear an established worm burden, and garlic is toxic to dogs and cats in meaningful amounts. Using them instead of a real wormer means the infection continues, and in a puppy with hookworms that delay matters.

Worming the pet but not the home is the other common miss, and it is the reason the same tapeworm appears to come back a fortnight later.

Frequently asked questions

What do worms in dog poop look like?

Roundworms look like pale spaghetti and are usually only seen after a wormer or in a heavy infection. Tapeworm segments look like moving grains of rice when fresh and sesame seeds when dried, and are more often found on the fur near the anus or in bedding than in the stool itself. Hookworms and whipworms are essentially never visible to the naked eye and are found only on a faecal test.

Can I treat worms without going to the vet?

You can buy wormers over the counter, but you need to know which worm you are treating, because the drugs differ. A product that clears roundworms may do nothing to tapeworms. If your pet is a young puppy or kitten, is losing weight, has bloody diarrhoea or pale gums, see a vet rather than guessing.

My dog has tapeworm but I have never seen a flea. How?

This is the usual situation. A dog only has to swallow one infected flea while grooming, and grooming is also how dogs remove fleas, so the evidence eats itself. Finding tapeworm segments is reliable evidence of flea exposure even when you never saw a flea.

How soon do wormers work?

Praziquantel kills tapeworms quickly, often within about a day, and the worm is digested rather than passed, so you usually see nothing. For other worms you may see dead worms in the stool for a day or two. Not seeing anything does not mean the treatment failed.

Do indoor cats get worms?

Yes. Fleas come indoors on clothing, on other pets and from shared walls in flats, and a single infected flea is enough for tapeworm. Indoor cats that hunt mice in the house can also pick up Taenia.

The honest summary

Four intestinal worms and one heartworm, each with its own route in and its own drug. Most infected animals look fine. The only worm you are likely to see is the tapeworm, and that one is really a flea problem. A negative faecal test rules out a lot, but it does not rule out what you saw with your own eyes.

If your pet is scooting, losing weight, or you have found anything that looks like rice near their back end, book the stool sample and say what you saw.

This article is general information and is not a substitute for veterinary advice. If your pet is unwell, contact your vet.

Sources: Companion Animal Parasite Council hookworm guidelines; US Centers for Disease Control and Prevention, toxocariasis; Cornell University Riney Canine Health Center, tapeworms; American Veterinary Medical Association, intestinal parasites in cats and dogs; VCA Hospitals, internal parasites in dogs.

The short answer: raw pet food carries a far higher chance of carrying Salmonella or Listeria than any other kind of pet food, and the FDA has the sampling data to show it. The bigger surprise for most owners is who gets ill. The clearest documented risk is not to the pet, it is to the people in the kitchen.

What the FDA actually found when it tested

This is the part that rarely makes it into a recall notice. Between October 2010 and July 2012 the FDA’s Center for Veterinary Medicine screened over 1,000 samples of pet food. In the second year it added 196 samples of commercially available raw dog and cat food. The results are published on the FDA’s own site and the gap is not subtle.

• Raw pet food, 196 samples: 15 positive for Salmonella, 32 positive for Listeria monocytogenes
• Dry dog and cat food, 240 samples: 1 positive for Salmonella, none for Listeria
• Jerky type treats, 190 samples: none for either
• Semi moist dog and cat food, 240 samples: none for either
• Dry exotic pet food, 190 samples: none for either

Put plainly, roughly one in four raw samples carried one of the two organisms. Across nearly 900 samples of everything else, there was a single positive. That is not a rounding difference, it is a different category of product.

The risk lands on your household, not just your pet

Here is the bit that genuinely surprises people. A healthy adult dog can shed Salmonella in its stool while looking completely fine. The animal is not the patient. The patient is whoever touches the bowl, the worktop, the fridge shelf, or the dog’s face afterwards.

The FDA and the CDC both make the same point: contaminated raw pet food can sicken the people handling it, through hands, surfaces, bowls and the pet itself. Young children, adults over 65, pregnant women and anyone with a weakened immune system carry the most risk.

So the honest way to think about a raw diet is not “will my dog cope with this”. It is “am I prepared to run a small raw meat processing operation in my kitchen, every day, without slipping”. If there is a baby crawling on that floor, the question answers itself.

Bird flu changed the maths for cats

Until recently this was a bacteria conversation. Then H5N1 arrived in the pet food supply.

At the end of December 2024, Los Angeles County’s public health department advised residents not to feed their pets Monarch Raw Pet Food sold at several California farmers markets. One house cat in the county was confirmed infected with H5N1 and four other cats in the same home were presumed positive. Separately, an Oregon house cat died after eating Northwest Naturals Feline Turkey Recipe, a frozen raw product that tested positive for the virus and was distributed across thirteen states and British Columbia.

Dr Michael Q. Bailey, then president elect of the American Veterinary Medical Association, put it bluntly to CBS News: raw milk and raw meat products can be and are a vector for carrying the virus.

The FDA has since told manufacturers that H5N1 counts as a known or reasonably foreseeable hazard when they use uncooked or unpasteurised material from poultry or cattle, which means it has to be written into their food safety plans. Cats are unusually susceptible, and in them the illness can move fast: fever, lethargy, heavy discharge from the eyes and nose, breathing trouble, then neurological signs.

Why the recalls keep coming

2026 has not been quiet. Northwest Naturals, Viva Raw and Raaw Energy have all pulled product over Salmonella or Listeria, and Go Raw expanded a recall to cover a lot of Steve’s Real Food freeze dried chicken over low thiamine, which is a different failure mode entirely and one we have written about before.

The pattern is structural rather than bad luck. Cooking is a kill step. Take it out and nothing downstream reliably replaces it, so the safety of the finished product depends entirely on the raw material and the handling, every single batch, forever. Freezing does not fix this. Freezing stops bacteria multiplying, it does not kill what is already there.

But cats eat raw prey, surely that settles it

It is a fair argument and it deserves a real answer rather than an eye roll. Cats do eat raw prey, and they are built for it.

The gap is in what happens between the animal and the bowl. A rabbit caught in the garden is eaten within minutes, by one cat, outdoors. Commercial raw is slaughtered somewhere else, ground, mixed with other carcasses, packed, frozen, shipped, thawed in your kitchen and served next to where you make toast. Each of those steps is a chance for contamination to enter and spread, and grinding in particular takes anything on the surface and distributes it right through the batch.

Owners choose raw for reasons that are easy to understand: better coats, smaller stools, a sense that it is closer to what the animal evolved to eat. Some of that is real and visible. The point is not that those owners are foolish. It is that the food safety risk is measurable and documented, while the health benefits remain largely anecdotal, and that is an uncomfortable trade rather than an obvious win.

If you are going to feed raw anyway

Plenty of people will read all of the above and carry on, and that is their call to make. The FDA’s own handling guidance is worth following properly rather than approximately:

1. Wash your hands for a full twenty seconds after any contact with the food, the bowl or the packaging.
2. Clean and disinfect every surface it touched, hot soapy water first, then a disinfectant. Wiping is not disinfecting.
3. Thaw in the fridge or the microwave, never on the worktop.
4. Do not rinse raw meat. Rinsing sprays bacteria around the sink rather than removing them.
5. Keep it physically separate from human food, with its own board and utensils.
6. Refrigerate what the pet does not finish straight away, and do not leave a bowl down all day.
7. Avoid letting a pet lick your face after a raw meal, and keep them off food preparation surfaces.

If anyone in the house is pregnant, under five, over sixty five or immunocompromised, this is the point to talk to your vet about whether a cooked or commercially sterilised alternative gets you most of what you wanted with far less exposure. Portion control matters just as much on raw as on anything else, and our guide to how much to feed a cat still applies.

Frequently asked questions

Does freezing raw pet food kill Salmonella?

No. Freezing halts bacterial growth but does not reliably kill Salmonella or Listeria. Both can survive freezing and become active again once the food thaws, which is why a frozen product can still test positive.

Can my dog get sick from raw food, or only people?

Both. Many dogs carry Salmonella without obvious illness, which is part of the problem, but dogs and cats can become genuinely unwell with vomiting, diarrhoea, fever and lethargy. Cats are also unusually vulnerable to H5N1 through raw poultry.

Is freeze dried or air dried raw any safer?

Not automatically. Drying removes moisture rather than applying a kill step, and freeze dried raw products appear in recalls alongside frozen ones. Check whether the manufacturer applies a validated pathogen treatment, and treat the answer “we test batches” as weaker than “we apply a kill step”.

What should I do if my pet ate a recalled product?

Stop feeding it, keep the packaging with the lot number, wash and disinfect anything it touched, and ring your vet for advice even if your pet seems fine. Watch for vomiting, diarrhoea, fever or lethargy, and take special care if anyone in the household is in a higher risk group.

Where can I check current recalls?

The FDA maintains a running list of pet food recalls, withdrawals and safety alerts, and it is the primary source that news coverage is drawn from. Check the lot numbers rather than the brand alone, because recalls are usually limited to specific batches.

The honest summary

Raw feeding is not a fringe choice and the people who do it are not careless. But the sampling data is what it is: roughly a quarter of raw samples positive, against one positive in nearly nine hundred samples of everything else. The hazard is real, it is mostly aimed at the humans in the house, and it does not go away with a better brand. It only gets smaller with handling discipline that has to hold every single day.

Household chemicals follow the same logic, and the one that kills fastest is antifreeze. Keeping an animal safe is mostly a series of small, boring routines that nobody notices when they work.

This article is general information, not veterinary advice. Talk to your vet about what suits your pet and your household, and contact them straight away if you think your pet is unwell.

Contamination is not only a bacterial question either. A separate 2026 analysis found heavy metals in almost every cat food it tested, and the number is far less alarming than it sounds once you look at what was measured. We went through it in heavy metals in cat food.

The short answer: antifreeze poisoning happens when a pet swallows ethylene glycol, a sweet tasting liquid used in engine coolant. A cat can die from about one teaspoon. Cats need veterinary treatment within roughly three hours of swallowing it, dogs within eight to twelve. Once the kidneys start failing, the odds drop sharply.

Why a pet would drink something that kills it

This is the part that catches owners out. Antifreeze isn’t something a cat tolerates by accident. It’s something a cat actively wants. Ethylene glycol is a sweet tasting, odourless liquid, and VCA Hospitals notes that cats may be drawn to it by both its smell and its taste.

So the usual mental model, that pets avoid things that are bad for them, just doesn’t hold here. A cat that walks past a drip under a parked car will often stop and lap it up. A dog that finds a puddle in a garage will drink it the way it drinks from any other puddle. Nothing about the experience warns them.

Manufacturers know this. Back in December 2012 the industry agreed voluntarily to add denatonium benzoate, an intensely bitter compound, to antifreeze sold in the United States, and the AVMA reported the agreement at the time. Seventeen states already required it. That’s a genuine improvement. It is not a guarantee, and vets still see cases every winter, because a bitter taste doesn’t do much to stop a thirsty animal that’s already swallowing.

How little it actually takes

The numbers are genuinely small. The Merck Veterinary Manual puts the minimum lethal dose of undiluted ethylene glycol at 1.4 mL per kilogram of body weight in cats, and 4.4 to 6.6 mL per kilogram in dogs.

Translated into things you can picture, the Pet Poison Helpline puts it at about one teaspoon for a cat, and a tablespoon or two for a dog, depending on size. A four kilogram cat is in lethal territory after roughly a teaspoon of the neat stuff. That is less than a bottle cap.

Cats are far more sensitive than dogs, which is why the same spill can be survivable for the labrador and fatal for the cat that shares the driveway.

The clock starts the moment they swallow

Ethylene glycol is absorbed fast. Merck records peak absorption at one to four hours after ingestion, with a serum half life of about three hours. The poison itself isn’t what destroys the kidneys. The body breaks it down into metabolites, and those are what do the damage. That single fact is why timing matters so much: the antidote works by stopping that breakdown, so it only helps while there’s still unmetabolised ethylene glycol to stop.

Wait until the pet looks properly ill, and that conversion has already happened.

The Pet Poison Helpline gives the working windows as three hours for cats and eight to twelve hours for dogs. The ASPCA’s guidance for professionals is slightly more generous for cats at four hours. Either way, you’re dealing in hours, not days, and the honest advice is to stop reading and phone someone now if this is happening to you.

What the first three days look like

Merck describes three stages, and the cruel part is the gap in the middle.

Stage one, roughly 30 minutes to 12 hours. The pet looks drunk. Wobbly on its feet, dazed, vomiting, drinking and urinating far more than usual. Owners often read this as a bug, or as the cat having got into something mildly unpleasant. Around the twelve hour mark many animals appear to pick up.

Stage two, 12 to 24 hours in cats and 36 to 72 hours in dogs. The kidneys begin to fail. The kidneys swell and become painful, heart rate and breathing speed up, the animal goes off food, becomes lethargic, and may develop ulceration in the gut. Seizures and coma are possible.

Stage three. Acute kidney failure that can’t be reversed. Urine output drops and then stops.

Two of those early signs deserve a flag, because they overlap with things owners already worry about. Heavy drinking and urinating is also the classic presentation of diabetes in dogs and cats, and fast breathing is on the list when you’re working out why your dog is panting so much. Sudden onset, in an animal with access to a garage or a driveway, is what pushes antifreeze to the top of the list.

Where pets actually find it

Hardly any of these cases involve a pet knocking a bottle off a shelf. The usual routes are duller and easier to miss:

• A slow leak from a car radiator or hose, pooling where the car is parked
• Spills from topping up or draining coolant, especially when the job is done outside on a cold morning
• An open or badly capped container in a garage or shed the pet can get into
• Puddles on a shared driveway or in a car park, where the leak came from someone else’s car entirely
• Older toilet antifreeze and some screenwash and brake fluid products, which can also contain ethylene glycol

Outdoor cats and cats with garage access are the highest risk group, partly because they roam and partly because it takes so little to hurt them.

What to do if you even suspect it

Treat suspicion as confirmation. The cost of being wrong in the other direction is too high.

1. Phone a vet or a poison line immediately. In the United States, Pet Poison Helpline is on (855) 764-7661 and the ASPCA Animal Poison Control Center is on (888) 426-4435, both 24 hours. Both charge a consultation fee. Pay it.
2. Say what you suspect and when. The time of exposure is the single most useful thing you can tell them, even if it’s a guess with a range.
3. Take the container or a photo of it if you have one, so the product and concentration are known.
4. Don’t make your pet vomit unless a vet tells you to on that call.
5. Go in, even if the pet seems fine. Looking fine at hour two means nothing. Looking fine at hour twelve can be the gap between stage one and stage two.

Vets can confirm it quickly. VCA notes there’s an in house test that detects ethylene glycol in the bloodstream, alongside blood and urine work. Treatment is an antidote called fomepizole, which blocks the enzyme that turns ethylene glycol into the metabolites that wreck the kidneys. Cats need a much bigger dose than dogs, 125 mg per kilogram to start against 20 mg per kilogram, which tells you something about how differently the two species handle it.

On prognosis, VCA is blunt: it’s very poor once clinical signs have developed, and a delay of even a few hours usually kills a cat. That sounds harsh written down. It’s also the reason this article exists.

How to cut the risk at home

None of this needs to be elaborate:

• Buy propylene glycol coolant instead. It’s the standard safer substitute and it’s sold everywhere. It isn’t harmless, but it doesn’t carry anything like the same risk.
• Fix leaks rather than topping up. A drip you’ve been ignoring since summer is the classic source.
• Clean spills properly. Absorb, then wash the area down thoroughly. Don’t leave a rinsed patch that’s still sweet.
• Store containers sealed and off the floor, in something the cat can’t get behind.
• Check under your car where you park, especially through autumn and winter. Merck notes cases cluster in the colder months.
• Steer round puddles on walks near parked cars and in car parks.

It’s the same logic that applies to the other household poisons worth knowing about, from chocolate through to grapes and raisins, which also attack the kidneys in dogs. Assume the pet will find it, and put it out of reach before they do.

Frequently asked questions

How long after drinking antifreeze will a cat show symptoms?

Usually within 30 minutes to 12 hours. Early signs look like drunkenness, with wobbling, vomiting and heavy drinking and urinating. Many cats then seem to improve around the 12 hour mark, which is misleading, because that’s when the kidney damage is getting under way.

Can a dog survive antifreeze poisoning?

Yes, if treatment starts early. Dogs have a longer window than cats, generally eight to twelve hours. Survival drops steeply once kidney failure has set in, so the deciding factor is almost always how fast the animal got to a vet.

Does the bittering agent make antifreeze safe now?

No. Adding denatonium benzoate makes antifreeze less appealing, and it’s a worthwhile change, but poisonings still happen. Treat every coolant as lethal regardless of what’s on the label.

How much antifreeze is toxic to a dog?

Merck gives a minimum lethal dose of 4.4 to 6.6 mL per kilogram of undiluted ethylene glycol. For everyday purposes, a tablespoon or two can kill a dog depending on its size, and smaller dogs are at much greater risk.

Is pet safe antifreeze genuinely safe?

Propylene glycol based products are much safer than ethylene glycol ones, which is why they’re worth buying. They’re still not something you want your pet drinking, so store and clean up after them the same way.

The one thing to take away

If your pet has been near coolant and is behaving oddly, don’t wait to see how they are in the morning. With cats in particular, the morning is usually too late. Phone a vet, say what you think they’ve drunk, and go in.

This article is general information, not veterinary advice. If you think your pet has swallowed antifreeze, contact your vet or an emergency poison line straight away.

Your vet now works from two separate diabetes rulebooks: one for dogs, one for cats. The American Animal Hospital Association split its 2026 guidelines by species for the first time, and the reason matters to you rather than just to the clinic.

Diabetes is not really one disease. In dogs and in cats it behaves differently enough that the treatment, the monitoring and even the odds of the pet coming off medication are not the same.

The Short Answer

Watch for four things: drinking much more, weeing much more, eating well but losing weight, and new tiredness. Every diabetic dog needs insulin for life. Some cats can go into remission, and a few now qualify for a daily liquid or tablet instead of injections. Any of those four signs means a vet appointment.

The Four Signs Owners Notice First

These are the classic ones, and they turn up in that order surprisingly often.

• Drinking much more than usual. Refilling the bowl more often, or a cat suddenly drinking from taps and glasses when it never did.
• Weeing much more. Bigger or more frequent puddles, a house-trained dog asking to go out at night, a litter tray that needs changing far more often.
• Eating normally or more, while losing weight. This is the one that should really get your attention. Food is going in and the animal is still shrinking, because the sugar is not reaching the cells that need it.
• New tiredness or weakness. Less interest in walks, sleeping more, a cat that stops jumping onto the things it used to.

Individually each of these has a dozen innocent explanations. Two or three together is a pattern. If your cat is drinking more and using the tray more, it is worth ruling this out before assuming it is a litter tray or behaviour problem.

Why Dogs and Cats Now Have Separate Guidelines

AAHA published its 2026 guidelines as two documents, one canine and one feline, in recognition of what it calls the unique nature of the disease process in each species. In plain terms:

Dogs develop a form with an absolute insulin deficiency, caused by permanent loss of the beta cells that make insulin. Those cells do not come back. Every diabetic dog is insulin deficient and every diabetic dog needs insulin therapy. There is no version of this where a dog is managed on diet alone.

Cats are different. Their diabetes more often resembles the human type 2 picture, where the pancreas is still working but the body has stopped responding properly. Catch it early, get the weight and diet right, and some cats stop needing treatment altogether. That is called remission, and it is not available to dogs.

What This Means If You Have a Dog

Insulin, twice a day, for life, alongside a consistent feeding schedule. That sounds daunting and it is genuinely a commitment, but AAHA’s own framing is worth quoting back to yourself on the bad days: diabetic dogs can live a good quality of life with few or no clinical signs, given attentive care, dietary and schedule adjustments, and diligent follow-up.

The practical points that make it work are routine ones. Feed at the same times. Inject at the same times. Keep the diet consistent rather than switching foods on a whim. Go to the follow-up appointments even when the dog seems fine, because seeming fine is the goal, not the finish line.

What This Means If You Have a Cat

Two things have changed, and both are good news.

First, injections are no longer the only option for every cat. The 2026 guidelines include recommendations on SGLT2 inhibitors, a class of drug given by mouth, following FDA approval of Bexacat in 2022 and Senvelgo in 2023. These are for otherwise healthy cats with diabetes that have not previously been treated with insulin. That last part matters: they are not a swap-in for a cat already stabilised on injections, and they are not suitable for a cat that is unwell at diagnosis.

Second, the monitoring has changed. Routine in-hospital blood glucose curves are no longer recommended for cats, because stress hyperglycaemia in a hospitalised cat can distort the readings badly enough to be misleading. A frightened cat at the vet produces high sugar readings whether or not its diabetes is controlled. Feline monitoring now leans on clinical signs, continuous glucose monitoring and glucose data collected at home.

If your vet suggests a sensor on the cat’s skin rather than a day of admissions and blood draws, that is the current guidance, not a shortcut.

The Emergency Nobody Warns You About

Untreated diabetes can tip into diabetic ketoacidosis, and that is a life-threatening emergency rather than a bad day. Go straight to a vet if you see:

• Vomiting, especially with any of the four signs above
• Complete loss of appetite in an animal that was eating well
• Rapid or laboured breathing
• Sweet or acetone-smelling breath
• Collapse, severe weakness, or an animal that cannot be roused properly

This is the reason the four early signs are worth acting on rather than watching for another fortnight. Lethargy and appetite loss can look like a hundred milder things, which is also true of stress in cats and of unexplained panting in dogs. The difference is how fast this one moves once it turns.

What to Do Now

1. Measure the water. Fill the bowl with a measuring jug for two days and write down how much goes in. “He seems thirsty” is hard for a vet to act on. “She is drinking a litre a day and she is a 4 kg cat” is not.
2. Weigh your pet. Home scales are fine. Weight loss alongside a good appetite is the single most useful thing you can report.
3. Book the appointment. Diagnosis is a blood and urine test, not a guess, and it is quick.
4. Take your notes with you. Water volume, weight trend, appetite, and when you first noticed.
5. Ask specifically about the 2026 guidelines if you have a cat. Whether an oral option or a glucose sensor suits your cat is a conversation worth having rather than assuming injections are the only path.

Keeping weight sensible is the one thing that genuinely reduces the risk in cats, which makes getting portions right more useful than it sounds.

Common Questions

Can diabetes in dogs be cured? No. The insulin-producing cells are permanently lost, so treatment is lifelong. It can be controlled well.

Can a cat really come off insulin? Yes, some do. Remission is most likely when it is caught early and weight and diet are addressed properly. It is not guaranteed and it can be lost again.

Is it caused by feeding sugar? No. Obesity is a genuine risk factor in cats, but a dog does not become diabetic from the odd biscuit. In dogs it is largely immune-mediated and genetic.

Which breeds are more at risk? In dogs, terriers, Samoyeds, Miniature Schnauzers and Poodles turn up disproportionately. In cats, Burmese have a known predisposition, and overweight middle-aged neutered males are the classic picture.

How much does it cost to manage? Ask your own vet, because insulin type, dose and monitoring vary widely. Ask at diagnosis rather than later, so you can plan properly.

The Bottom Line

Drinking more, weeing more, eating well while losing weight, and new tiredness. That is the list. In a dog it means insulin for life and a routine that works. In a cat it might mean remission, or a tablet instead of a needle, especially if you catch it early.

The 2026 guidelines are aimed at vets rather than owners, but the headline is worth knowing: your dog and your cat have genuinely different diseases with the same name. You can read AAHA’s own summary of the 2026 canine guidelines and the feline guidelines.

This article is general information for pet owners, not veterinary advice. If you think your dog or cat may be diabetic, contact your veterinary practice.