Foods toxic to cats
Cats are obligate carnivores. Human food is not a treat by default, and several everyday ingredients are poisonous. Chocolate — especially dark chocolate and cocoa — can cause restlessness, vomiting and heart changes. Onion, garlic and other alliums can damage red blood cells, including in cooked leftovers, gravy and powdered seasoning. Grapes and raisins are treated as a kidney emergency in veterinary practice even though feline evidence is thinner than it is in dogs. Alcohol can poison a cat from a sip, including desserts, mouthwash and raw yeast dough that ferments in the stomach. Caffeine in coffee grounds, tea bags and energy drinks is another high-risk leftover.
Plenty of other foods sit in a greyer zone. Milk often causes diarrhoea because most adult cats are lactose intolerant, not because milk is a classic toxin. Ham, cheese and peanut butter are more about salt, fat and hidden xylitol than a single poison. Cooked bones splinter. Plain pumpkin flesh is not a classic toxin; pumpkin pie filling often is.
This hub collects every Toxic Kitty guide to foods cats should not eat, what a nibble might mean, and when leftovers become an emergency. If your cat has swallowed something on this list, call your vet. Do not wait for symptoms, and never make a cat vomit at home unless a vet tells you to. This is guidance, not a diagnosis.
This article is for general information only and is not a substitute for veterinary advice. If you suspect poisoning, contact your vet or an emergency clinic immediately.
Highest-risk items at a glance
Severity here matches what our existing guides say. If exposure has already happened, contact a vet rather than using this list as a delay.
- High riskChocolateEspecially dark chocolate and cocoa. Can cause agitation, vomiting and heart changes.
- High riskOnions, garlic and alliumsRaw, cooked or powdered — including gravy, soups and seasoning. Can cause anaemia.
- EmergencyGrapes and raisinsVets treat every grape or raisin exposure as an emergency because of possible kidney failure.
- EmergencyAlcoholEven a sip can be dangerous — drinks, desserts, mouthwash and fermenting dough.
- High riskCaffeineCoffee grounds, tea bags and energy drinks can harm cats. Keep brewing leftovers out of reach.
- High riskXylitolIn gum, some peanut butters and sugar-free products. Treat known ingestion as an urgent vet question.
- High riskRaw yeast doughDough can expand in the stomach and produce alcohol. Baked bread is a different risk.
- High riskCooked bonesCooked bones splinter. Roast gravy is often onion. Not a classic toxin — still an emergency risk.
Highest-risk human foods
- 25 Human Foods Cats Should Never Eat8 min read
- Can Cats Eat Chocolate? What to Do If They Do5 min read
- Are Onions and Garlic Toxic to Cats?5 min read
- Are Grapes and Raisins Toxic to Cats?5 min read
- Can Cats Drink Alcohol? Why Even a Sip Is Dangerous9 min read
- Caffeine and Cats: Coffee, Tea and Energy Drink Risks9 min read
- Is Xylitol Toxic to Cats? Sugar-Free Sweetener Risks9 min read
- Can Cats Eat Raw Dough? Yeast and Bread Dough Dangers8 min read
Kitchen leftovers and everyday foods
- Can Cats Eat Tuna, Cheese, Eggs and Other Human Foods?6 min read
- Cat-Safe Kitchen: What to Keep Off the Counter5 min read
- Is Milk Bad for Cats or Actually Toxic?5 min read
- Is Avocado Toxic to Cats?8 min read
- Can Cats Eat Ham, Bacon and Other Cured Meats?8 min read
- Can Cats Eat Raw Fish and Raw Meat?9 min read
- Can Cats Eat Bananas, Strawberries and Watermelon?8 min read
- Can Cats Eat Bread and Rice?8 min read
- Can Cats Eat Peanut Butter?8 min read
- Can Cats Eat Cheese? Lactose, Fat and Winter Cheeseboards10 min read
- Can Cats Eat Cooked Chicken? Bones, Gravy and Sunday Roast Leftovers10 min read
- Can Cats Eat Pumpkin? Flesh, Seeds, Spice and Halloween Leftovers10 min read
- Can Cats Eat Dog Food? Hidden Risks Explained5 min read
Seasonal food hazards
Common questions
What can cats not eat?
Chocolate, onion, garlic and other alliums, grapes, raisins, alcohol and caffeine are among the highest-risk human foods. Many other leftovers are unsafe because of xylitol, cooked bones, or rich, salty meat. When in doubt, keep human food off the counter.
Can cats drink milk?
Most adult cats are lactose intolerant, so cow's milk often causes diarrhoea. That is not the same as a classic toxin such as chocolate, but milk is still a poor treat.
Are grapes toxic to cats?
Veterinary teams treat grape and raisin exposure as an emergency because of kidney-failure risk in dogs and uncertainty in cats. Do not wait to see if your cat seems fine — contact a vet.
Is Toxic Kitty a replacement for a vet?
No. Toxic Kitty provides guidance, not a diagnosis. If your cat has eaten something toxic or is showing symptoms, contact a vet or an emergency clinic immediately.