Finding a pile of vomit on the carpet is an unpleasant but common part of living with cats. Many cats throw up from time to time, and a single episode in an otherwise happy, healthy cat is not always a cause for alarm. However, vomiting can also be a sign of illness, so it is important to know the difference. This guide explains the most common reasons cats throw up, what you can do at home, and the warning signs that mean your cat needs a veterinarian.
Vomiting vs. Regurgitation
It helps to know what you are seeing. Vomiting is an active process: your cat usually looks uneasy, may drool or lick their lips, and you will see the belly heave before food or liquid comes up. Regurgitation is more passive. Undigested food comes back up soon after eating, often in a tube shape, with little effort. Regurgitation is often linked to eating too fast, while vomiting can have many causes. Telling your vet which one you saw helps them find the cause.
Common Reasons Cats Throw Up
Hairballs
Cats swallow loose hair while grooming. Most of it passes through the gut, but some can collect in the stomach and come back up as a hairball. Long-haired cats and cats that groom heavily are more likely to have them. Occasional hairballs can be normal, but frequent hairballs may be a sign of over-grooming, skin problems, or digestive issues.
Eating Too Fast
Cats that gulp their food, especially dry food, may bring it straight back up. This is common in multi-cat homes where cats compete for food.
A Sudden Change in Diet
Switching foods too quickly can upset your cat’s stomach. Any new food should be introduced gradually over about seven to ten days by mixing increasing amounts with the old food.
Eating Something They Should Not
Cats may chew on plants, string, hair ties, or other objects. Some houseplants are toxic to cats, and swallowed string or thread can cause dangerous blockages. Learn which foods are risky in our guide to foods cats should never eat.
Food Sensitivities
Some cats react to certain proteins or ingredients in their food, which can cause vomiting, diarrhea, or skin problems. A vet can help you plan a food trial to find the cause.
Medical Conditions
Repeated vomiting can be linked to many health problems, including intestinal parasites, inflammatory bowel disease, kidney disease, an overactive thyroid, diabetes, liver disease, pancreatitis, and others. Older cats are especially at risk, which is why ongoing vomiting should always be checked.
What You Can Do at Home
If your cat vomits once but is otherwise bright, eating, and behaving normally, you can usually monitor them at home:
- Remove food for a few hours, but keep fresh water available
- Offer a small portion of their usual food later and watch how they handle it
- Keep a simple diary of when vomiting happens, what it looks like, and what your cat ate
- Check your home for chewed plants, string, or small objects
Never give your cat human medicines, including anti-nausea tablets or pain relievers, unless your veterinarian tells you to. Many human medicines are toxic to cats.
Tips to Reduce Vomiting
- Slow down fast eaters. Use a slow feeder bowl, a puzzle feeder, or spread food on a flat plate.
- Feed smaller, more frequent meals instead of one or two large meals.
- Brush your cat regularly to reduce the amount of hair they swallow, especially during shedding seasons.
- Change foods gradually over a week or more.
- Feed cats separately if competition causes them to eat quickly.
- Keep toxic plants and string-like items out of reach.
- Encourage good hydration. See our tips on how to get your cat to drink more water.
When to See a Veterinarian
Contact your veterinarian promptly if your cat:
- Vomits more than once or twice in a day, or vomits regularly over several days or weeks
- Cannot keep water down
- Has blood in the vomit, or vomit that looks like coffee grounds
- Seems lethargic, weak, or is hiding more than usual
- Has diarrhea as well, or has not passed stool
- Stops eating for more than 24 hours
- Is losing weight
- Is a kitten, a senior cat, or has an existing health condition
- May have swallowed string, a toy, a toxic plant, or medication
Repeated retching with nothing coming up, a painful or swollen belly, or collapse are emergencies. Go to a veterinary clinic right away.
What Your Vet May Do
Your veterinarian will ask about your cat’s diet, routine, and vomiting pattern, then perform a physical exam. Depending on the findings, they may recommend blood tests, a stool test, X-rays, or an ultrasound. Bringing your vomiting diary or even a photo of the vomit can be surprisingly helpful.
Final Thoughts
Occasional vomiting can happen, especially with hairballs or fast eating, but frequent vomiting is not normal and should never be ignored. Watch your cat’s overall behavior, appetite, and energy, make simple changes like slowing down meals and brushing regularly, and contact your vet whenever you are unsure.
Related reading: Foods Cats Should Never Eat · Signs Your Cat Is Stressed · How to Choose a Good Veterinarian
Helpful Resources
- International Cat Care – expert advice on cat health and behaviour
- Cornell Feline Health Center – veterinary information on cat health