Why overeating can make a cat vomit
When a cat eats a large amount quickly, the stomach can stretch faster than it can cope with, and the food may come back up soon after. This is often regurgitation or vomiting of undigested, sometimes tube-shaped, food. It is common enough to be one of the first things vets consider when a cat vomits right after meals. It is still worth taking seriously if it happens often.
Reasons cats eat too much or too fast
- Competition. In multi-cat homes, a cat may gulp to protect the food.
- Food anxiety. Cats with a history of scarcity, such as former strays, may eat very fast.
- Boredom or routine. Large meals offered rarely, instead of small meals more often, can encourage gulping.
- Free access to food with no structure. Some cats overeat when food is always available.
- Stress. Changes at home can affect eating habits and digestion; see can stress make a cat vomit.
When constant hunger is a medical sign
A cat who always seems ravenous and also vomits may have a medical issue. Conditions such as an overactive thyroid or diabetes can increase appetite, and other digestive problems can cause vomiting after meals. These are more common in older cats, so see old cat throwing up a lot. If your cat’s appetite has changed noticeably, or weight is changing (see why a cat loses a lot of weight), book a vet visit rather than adjusting the diet alone.
How to help at home
These steps are low risk for most healthy adult cats, but check with your vet first if your cat has any health condition:
- Divide the daily food into several smaller meals rather than one or two large ones.
- Use a slow-feeder bowl, puzzle feeder or lick mat to slow the pace.
- Feed cats separately if they compete.
- Keep portions measured so you know how much your cat gets.
- Keep the feeding area calm and consistent.
- Switch foods gradually over several days if you change them.
Do not give human medicines or home remedies for vomiting unless your vet advises it. Water should stay available.
Choosing food
Some cats do better on a different diet, but the right choice depends on your cat’s health and history. Ask your vet whether a change is sensible and what type of food suits your cat, rather than choosing a product based on advertising. See also why your cat threw up food for what to do right after an episode.
When to see a vet
Call your veterinarian if:
- Vomiting happens repeatedly or after most meals
- Your cat has blood in the vomit
- Your cat is lethargic, painful, or stops eating
- There is diarrhoea, weight loss, or a change in drinking or urination
- You suspect a swallowed object or toxin
- Your cat is a kitten; see kitten throwing up undigested food
A bloated or hard belly with repeated retching and little coming up is an emergency.
Frequently asked questions
What is the best cat food to help prevent vomiting?
There is no single best food. Your vet can recommend one based on your cat’s health, and a gradual transition helps.
What are some home remedies for a cat who is vomiting?
Slower feeding, smaller portions and a calm feeding area can help with vomiting from fast eating. For ongoing or severe vomiting, see a vet rather than trying remedies.
What are four signs your cat is suffering?
Signs can include hiding, not eating, changes in litter box habits, and unusual quietness or irritability. Any of these is a reason to call your vet.