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Which human foods are safe for cats, and which should I never give?

A few plain, cooked foods are safe as occasional treats (keep all treats under ~10% of daily calories) - but several common foods are toxic and must never be given.Fact

Clearly safe in small amounts: plain cooked chicken or turkey, plain fully-cooked egg, and small pieces of plain cooked fish. Use caution with dairy (cheese/milk) and tuna. Never give onion, garlic, chocolate, grapes/raisins, xylitol, or alcohol - those go to poison control, not a portion size.

Applies to: Healthy adult cats getting an occasional treat alongside a complete-and-balanced diet. Human food is a topper, never a meal. Kittens, seniors, and cats with medical conditions should get treats cleared by a vet.

Steps

Clearly safe in moderation (treat, not a meal)Fact
Plain and cooked is the rule - no salt, butter, oil, or seasoning, and nothing from a seasoned dish. Keep all treats combined to about 10% of daily calories.
  • Plain cooked chicken or turkey - boneless, skinless, unseasoned; up to ~2 tbsp/day for an adult cat (PetMD)
  • Plain fully-cooked egg - cooked to 160F, no salt/butter/oil, ~1 tablespoon (PetMD)
  • Small pieces of plain cooked fish - occasional, boneless
  • Always remove bones; never add garlic/onion salt or gravy
Use caution (small, occasional, some cats not at all)Fact
Not toxic, but easy to overdo or poorly tolerated.
  • Tuna: occasional treat only, chunk-light not albacore, never a staple - mercury and nutritional imbalance risk (Tufts)
  • Cheese and milk: many cats are lactose-intolerant, so dairy can cause diarrhea/digestive upset (ASPCA) - tiny amounts at most, skip if it causes GI upset
  • All of the above still count toward the 10% treat limit
Never give - these are toxic (this is not a 'safe amount' question)Fact
There is no safe portion for these. If your cat eats any, it's a poison-control call, not a portion to look up.
  • Onion, garlic, chives (and onion/garlic powder) - red-blood-cell damage/anemia
  • Chocolate, coffee, caffeine - methylxanthines; heart, tremors, seizures
  • Grapes and raisins - kidney damage
  • Xylitol (sugar-free gum/candy/baked goods) - low blood sugar, liver damage
  • Alcohol and raw yeast dough - can be life-threatening
  • Also avoid: macadamia nuts, raw egg/raw meat (Salmonella/E. coli), cooked bones, heavily salted foods

Normal vs keep-watching

Normal: Cats are obligate carnivores; a small plain-cooked-meat treat now and then is normal. Human food should never crowd out their balanced diet.

Keep watching: After any new treat, watch for vomiting, diarrhea, drooling, or unusual lethargy - and stop the treat if it causes upset.

When to contact a vet. If your cat ate any toxic food - onion, garlic, chives, chocolate/caffeine, grapes, raisins, xylitol, alcohol, macadamia nuts, or raw yeast dough - contact the ASPCA Animal Poison Control Center at (888) 426-4435 and your veterinarian immediately; do not wait for symptoms and do not induce vomiting on your own. Also call the vet if your cat stops eating for more than 24 hours. Prescription/therapeutic feeding for a diagnosed condition is a vet's decision.

What changes this answer

  • Toxic item involved -> this stops being a food question and becomes poison control + vet, now
  • Kitten, senior, pregnant, or a cat with kidney/GI/pancreatitis history -> clear treats with the vet first
  • Overweight cat -> tighten the 10% treat budget
  • Known dairy intolerance -> skip cheese/milk entirely
  • Raw diet interest -> raw egg/meat carry pathogen risk; discuss safe handling with a vet

Common mistakes

  • Sharing seasoned/cooked dishes that contain onion or garlic
  • Treating tuna as a daily staple
  • Giving milk because 'cats like it' (most are lactose-intolerant)
  • Leaving toxic foods (chocolate, grapes, gum with xylitol) within reach
  • Letting treats replace part of the balanced diet

Sources

Real questions cat owners ask

  • Can cats eat cooked chicken? Yes - plain, boneless, unseasoned, in small amounts.
  • Can cats have tuna? Only occasionally, chunk-light, never as a main food.
  • Can cats drink milk? Best avoided - most adult cats are lactose-intolerant.
  • My cat ate onion/garlic/chocolate/grapes/xylitol - what do I do? Call ASPCA Poison Control at (888) 426-4435 and your vet immediately; there is no safe amount.
Note any treat that caused GI upset in the Passport so you can avoid it and flag a pattern to the vet. Set up your Cat Passport.

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