Every cat parent dreads that gut-wrenching sound. Cat vomit is defined as a feline retching and ejecting contents from their small intestines.
While it sounds pretty self-explanatory, cat vomit can be mistaken for coughing or regurgitating, which isn’t the same thing. Regurgitation happens when a cat ejects the contents of their esophagus — usually food they’ve eaten too quickly.
Vomit, on the other hand, includes things that made it past your cat’s esophagus to their stomach or small intestines. Interestingly, a hairball (Trusted Source) may be vomited or regurgitated, depending on how far it traveled before it was expelled.
Here are some other common reasons cats vomit, including what you can do to help them feel better.
Despite their reputation for possessing nine lives, cats are surprisingly delicate. Their natural curiosity often outwits their tiny kitty brains into sneaking a tantalizing bite of human food, sampling houseplants, or ingesting toxic household chemicals.
The list of potential cat dangers in the average American household is virtually endless — and so are the possibilities for disastrous tummy problems. Here are 12 common reasons that cats vomit:
While it may not be shocking to learn that harsh cleaning supplies are toxic to cats — as they are to virtually every living creature — many chemicals that are safe to use around humans and even dogs can have devastating effects on cats.
For example, while it’s sometimes okay to give a small amount of hydrogen peroxide to dogs to induce vomiting, the same compound causes intestinal ulcers in felines and should never be used internally or externally.
Some foods in your pantry, such as raisins and chocolate bars, are poisonous to your cat. But even non-toxic human foods like milk and cheese can cause tummy troubles due to food intolerances and high-fat content.
Imagine your cat’s tongue like a vacuum filter. As your cat grooms themself, loose fur sticks to your cat’s tongue and gets inadvertently swallowed and stuck — just like hair wound up in a vacuum filter. If hairballs don’t pass through your cat’s digestive tract into their feces, they get regurgitated or vomited.
Fun fact: vomited hairballs are round while regurgitated hairballs are oblong due to the shape of a cat’s esophagus.
Hair ties, pen caps, and bottle tops can all wind up in your cat’s mouth. If they don’t choke on these objects, they end up in your cat’s stomach. However, foreign objects don’t typically digest properly, so they’re vomited or become obstructed in the GI tract.
Ultimately, if food can’t pass through, it comes back up. Serious constipation can cause vomiting, especially if it’s coupled with a loss of appetite.
While cats tend to watch their portions more than dogs, they might still overeat if the opportunity presents itself. Make sure to only feed your cat the amount of food recommended for their size and age. You should also store human and pet food securely away from your cat to prevent them from stealing snacks.
Too much food can make your cat nauseous, but so can extreme hunger. Call your vet if your adult cat goes longer than 24 hours without eating. Kittens and pregnant cats should eat at least every 12 hours — and more often than that if they’re weaning or under 6 months old.
Sudden diet changes can cause unpleasant side effects like vomiting and diarrhea. Gradually phase out your cat’s old food when you change their diet, rather than switching to the new food all at once.
Your cat might not be able to explain the mind-body connection like a yoga instructor, but they intuitively feel it and their body reacts accordingly. Stress and anxiety affect seemingly unrelated parts of your cat’s body. These negative emotions cause physical harm, such as urinary tract infections and gastrointestinal distress like diarrhea and vomiting.
Intestinal parasites like tapeworms can cause vomiting and diarrhea. Keeping your cat on flea/tick prevention and deworming them at your vet’s discretion can help prevent intestinal parasites.
I recommend checking a fecal sample on cats once a year to determine if they need to be dewormed. Keeping them on monthly heartworm, flea, and intestinal parasite preventative will help prevent most parasites. This is especially important if your cat goes outside.
Dr. Jennifer Schott
While certainly not the most common reason for vomiting, cancerous tumors can cause GI upset. Usually, this is more likely if your cat suffers from chronic vomiting rather than acute.
Yellow cat vomit may be bile from their liver. Pancreatitis (Trusted Source) refers to inflammation of the pancreas. It can occur suddenly or develop over time, which is known as acute or chronic. While it’s a common issue in dogs, pancreatitis is relatively rare in cats and often comes in tandem with diabetes or liver disease.
👉 Yellow or bilious vomiting isn’t always concerning. It can also be a sign that your cat’s stomach is empty.
The color of cat vomit can give you clues to the culprit. Here’s a chart with a brief rundown of what the colors may signify:
While the color of your cat’s vomit may indicate possible reasons, something else your cat has eaten may muddy the waters. When trying to figure out why your cat is vomiting, take note of your cat’s health as a whole, especially if your cat is experiencing any other symptoms, such as pale gums or seizures.
Cat vomit can have many different causes. Noting other symptoms and paying attention to details can help you or your veterinarian narrow down the underlying cause. Ask yourself questions like:
Always call your vet if your cat vomits or has diarrhea more than 2 or 3 times a day. When you get there, be prepared to answer these questions and provide a stool sample if diarrhea has been an issue.
Once your veterinarian learns all of the possible clues, they’ll decide how to proceed. Depending on the most probable cause, they may recommend blood work with urinalysis to test for diseases, fecal flotation for parasites, x-rays, abdominal radiographs, or a combination of these.
Common treatment methods include:
If your vet doesn’t find anything out of the ordinary, they’ll likely recommend supporting treatment such as feeding 25% of their normal food or plain boiled chicken until their tummy settles. They may also recommend a follow-up appointment or further testing in a couple of weeks, especially if the issue isn’t fully resolved.
While every gag doesn’t necessitate a trip to the vet, paying attention to how often and when your cat vomits can clue you into medical problems early so you can get them the treatment they need. Kittens and adult cats with health issues are at an elevated risk of dehydration, so don’t hesitate to call the vet — especially if they’re also having diarrhea or acting sick.
If a cat vomits once or twice but still acts relatively well, you can feed them a quarter portion of their regular food, or plain boiled chicken. The most important task is to keep them hydrated. While your cat can live a long time without food, dehydration is a much bigger danger. You should always call your vet if your cat goes more than 12 hours without eating or drinking.
If your cat throws up more than two or three times a day, you should call the vet. You can always call sooner than that if you’re worried about them, they’re presenting other signs of sickness, they’re vulnerable due to age, or have underlying health issues.
Brown or red vomit indicates blood, which warrants a call to the vet. You should also call a vet immediately if your cat vomits a piece of a worm so you can have your pet thoroughly dewormed, as well as any other animals in your house.
Your vet will likely prescribe Cerenia (maropitant) or Zofran (ondansetron) to combat your cat’s nausea. If you’re trying to ease the symptoms at home, make sure your cat stays hydrated and feed them reduced portions of their food or plain boiled chicken until they’re feeling better.
The color and timing of your cat’s vomit can tell you a lot about the cause. If your cat vomits soon after their meal, they might eat too quickly and regurgitate their food. A slow feeder bowl may help speedy cats enjoy their meal better and improve their digestion. Irregular colors or segments in their food may indicate other issues. Always call your vet if your cat vomits more than three times a day or if the problem happens intermittently over the week.
