Foods toxic to cats — the complete guide
Cats process food differently than dogs and humans. Their liver lacks key enzymes — small amounts of certain foods can be fatal. Here's the comprehensive list.
Why cats are different
Cats are obligate carnivores with a liver missing several glucuronyl transferases. They cannot detoxify many compounds that humans and dogs handle easily. Three things make cat toxicity especially dangerous:
- Smaller body size — toxic doses are tiny
- Compulsive grooming — chemicals on fur get licked off
- Strong fasting response — cats that stop eating develop hepatic lipidosis (fatty liver) in days
Never feed — toxic to cats
- Onions, garlic, leeks, chives — cats are MORE sensitive than dogs. Even garlic powder in baby food can hurt them.
- Chocolate — same theobromine toxicity as dogs.
- Grapes & raisins — same kidney failure risk as dogs.
- Xylitol — less studied in cats but still avoid.
- Lilies (any variety, even pollen) — kidney failure. Cats die from licking pollen off their fur.
- Alcohol — extremely sensitive.
- Raw bread dough — expands and ferments.
- Caffeine — coffee, tea, energy drinks.
- Citrus oils — limonene and linalool in lemon, orange, grapefruit. Avoid citrus essential oils entirely.
- Tea tree oil — extremely toxic, even diluted.
Surprising "no" foods
- Milk — most adult cats are lactose intolerant despite the cartoon stereotype. Causes diarrhea.
- Raw fish — contains thiaminase that destroys vitamin B1, leading to neurological issues over time.
- Raw eggs — same biotin-blocker issue as in dogs.
- Canned tuna (regularly) — mercury accumulation. Occasional bite is fine.
- Dog food — lacks taurine, which cats can't synthesize. Long-term causes blindness and heart disease.
Safe in moderation
- Plain cooked chicken, turkey, beef — small amounts, no seasoning
- Plain cooked salmon — small amounts
- Scrambled eggs — fully cooked, plain
- Pumpkin (plain) — vet favorite for digestive issues and hairballs
- Blueberries, melon — many cats lack the taste receptors but it's safe
Symptoms of poisoning in cats
- Drooling (cats rarely drool — this is significant)
- Vomiting
- Hiding more than usual
- Wobbliness, weakness
- Pale or yellow gums
- Loss of appetite (especially for 24+ hours — emergency in cats)
- Difficulty breathing
- Tremors
If your cat ate something toxic
- Call ASPCA Poison Control: 888-426-4435 immediately
- Bring sample/packaging to vet
- Don't induce vomiting (cats are very hard to make vomit safely at home)
- Don't wait — cats decompensate fast
Sources: ASPCA APCC, Cornell Feline Health Center, Merck Vet Manual. Last reviewed January 2025.