Which everyday foods are dangerous for cats?

Cats are usually pickier than dogs, which protects them from a lot. But the risky foods for cats are less famous than the dog list, and a couple of cat-specific traps masquerade as treats. Here’s what’s worth knowing.

Onions and garlic — the big one

Everything in the allium family (onion, garlic, chives, leeks) damages cats’ red blood cells, and cats are more sensitive to it than dogs. The common route isn’t a raw onion — it’s onion or garlic powder hiding in broth, gravy, baby food, or seasoned leftover chicken. If you share cooked meat, share it unseasoned.

The milk myth

Most adult cats are lactose intolerant. A saucer of milk usually doesn’t poison anyone, but it can cause digestive upset. If your cat adores dairy, lactose-free cat milk exists; regular milk is a misplaced tradition, not a treat.

The tuna trap

Human canned tuna is not a complete diet for cats. Keep the main diet nutritionally complete and ask your veterinarian about suitable treats for your cat’s health. Cornell’s guide to feeding cats.

Raw dough and alcohol

Raw yeast dough is doubly dangerous: it expands in a warm stomach, and the fermenting yeast produces alcohol. Cats are very small animals — what counts as a trace of alcohol for you is a real dose for them.

Chocolate and caffeine

Less famous than for dogs only because cats rarely volunteer to eat it — but theobromine and caffeine are just as toxic to cats. The risk peaks with anything dark, concentrated, or powdered (cocoa).

Not food, but in the kitchen: lilies

One non-food item belongs here because it is an emergency risk: true lilies and daylilies. Leaves, flowers, pollen and vase water can cause severe kidney injury in cats. Contact a veterinarian immediately after suspected exposure, even if your cat looks well. FDA guidance on lilies and cats.

If your cat ate something on this list

Same playbook as for dogs: don’t wait for symptoms, call your vet or a pet poison hotline, and have the what / how much / when / body-weight numbers ready.

This article is general information, not veterinary advice. When in doubt, call your vet.

For individual foods, see the cat food safety guide. For plants and household hazards, use the cat toxicity guide.