By Priya Nair (RVN) · Last updated 17 May 2026
Cats are obligate carnivores. That’s the single most important framing for any cat-food conversation. They evolved to eat almost-entirely-meat diets, and their physiology reflects it — they need pre-formed taurine, arachidonic acid and Vit A from animal sources, they have minimal carbohydrate-digesting enzymes, and many of the “healthy human foods” you’d give a dog are problematic or toxic for cats.
Vet-now toxic list
- Onion, garlic, leek, chives — damages red blood cells. Even small chronic exposure (baby food with onion powder, for example) matters.
- Chocolate — same theobromine + caffeine combo as in dogs. Cats are less likely to eat it but no less affected.
- Grapes and raisins — kidney damage. Same as in dogs.
- Lilies — not a food but listing because cats nibble plants. All true lilies (Lilium and Hemerocallis species) cause acute kidney failure. One leaf or even pollen on the coat is enough. If you have a cat, do not have lilies in the house.
- Xylitol — less well-studied in cats than dogs but treated as dangerous
- Alcohol — even small amounts
- Caffeine — coffee grounds, tea bags
- Raw bread dough — expands, ferments
- Most human medications — paracetamol/acetaminophen is particularly dangerous to cats. A single tablet can kill.
- Antifreeze — they like the sweet taste and one spill in the driveway is enough
- Tuna in oil, daily — surprisingly common cause of steatitis (yellow fat disease) when fed exclusively or daily. Tuna is fine as an occasional treat.
- Liver in large or daily amounts — Vit A toxicity
Foods cats handle fine
| Food | Safe? | Notes |
|---|---|---|
| Cooked chicken (plain, no bones) | ✅ | Excellent. Use as topper or training treat. |
| Cooked turkey (plain) | ✅ | Same |
| Cooked beef (lean, plain) | ✅ | Same |
| Cooked fish (white fish, salmon) | ✅ | Plain, deboned. Not daily. |
| Cooked egg | ✅ | Hard-boiled, scrambled, no seasoning |
| Plain yogurt | ⚠️ | Small amount — many cats are lactose intolerant |
| Cooked rice | ✅ | Bland-diet staple |
| Cooked pumpkin (plain) | ✅ | Helps digestion |
| Cucumber | ✅ | Some cats love |
| Cooked carrot | ✅ | Some cats nibble |
| Watermelon (no seeds, no rind) | ✅ | Tiny amount |
| Blueberries | ✅ | One or two |
| Cantaloupe | ✅ | Cats often love it — myth says they smell amino acids |
| Plain cooked broccoli, green beans, peas | ✅ | Tolerated but not required |
| Cat-formulated milk replacer (KMR) | ✅ | For kittens |
| Regular cow’s milk | ❌ | Most adult cats are lactose intolerant. The “saucer of milk for the cat” image is doing harm. |
| Raw fish | ❌ | Thiaminase destroys Vit B1 |
| Raw egg whites | ❌ | Avidin binds biotin |
| Bones (cooked) | ❌ | Splinter risk |
| Vegan / vegetarian diet | ❌ | Cats are obligate carnivores. They cannot thrive on plant-only diets. |
What a healthy cat diet looks like
- Complete commercial food meeting AAFCO / FEDIAF standards for the life stage
- Wet food daily — cats are descended from desert ancestors and have a low thirst drive. Wet food = water intake = bladder health
- Dry food can complement wet but should rarely be the whole diet (chronic dehydration → urinary issues)
- Two meals minimum, or grazing throughout the day for cats who self-regulate well
- Always fresh water, ideally a flowing fountain — cats prefer moving water
- No more than 10% of daily calories from treats / extras
Wet vs dry food
| Wet | Dry | |
|---|---|---|
| Water content | 70-80% | 5-10% |
| Calorie density | Lower | Higher |
| Dental impact | Neutral | Slight cleaning effect (mostly overstated) |
| Urinary health | Supports | Risk if exclusively dry + low water |
| Convenience | Lower | Higher |
| Cost | Higher | Lower |
| Best for | All cats, especially indoor, senior, urinary-prone | Free-feeding, multi-cat, less spoilage |
Bland diet for upset cats
- Boiled, skinless, plain chicken breast
- Small portions (1-2 tablespoons), every 4-6 hours
- For 24-48 hours, then transition back to normal food
- If symptoms persist 24h+ or worsen — vet now
Cats are less tolerant of fasting than dogs — they can develop hepatic lipidosis (fatty liver disease) after just 48 hours of not eating. A cat that’s refused food for 24 hours needs a vet, not “let’s see how it goes overnight”.
Weight management
Indoor-cat obesity is rampant. The portions on the bag are usually 20-30% too high. Realistic feeding guides for adult cats:
- 3kg cat: 180-200 kcal/day
- 4kg cat: 220-260 kcal/day
- 5kg cat: 250-300 kcal/day
Weigh your cat monthly. A 4kg cat at 5kg is the equivalent of a 70kg person at 90kg.
Indoor plants that are also dangerous
- All true lilies (Lilium, Hemerocallis) — acutely fatal
- Sago palm — liver failure
- Azalea, rhododendron — cardiac toxicity
- Oleander — cardiac
- Tulip, hyacinth, daffodil bulbs — vomiting, severe in larger amounts
- Pothos, philodendron — oral irritation, drooling
- Aloe vera — vomiting, lethargy
If a cat is going to chew on something, it’ll chew on the houseplants. ASPCA maintains a comprehensive toxic plant list — worth scanning before buying anything new.
Emergency contact info
- Australia: Animal Poisons Helpline 1300 869 738
- UK: Animal PoisonLine 01202 509000
- USA: ASPCA Animal Poison Control 1-888-426-4435
Sources
- ASPCA — Toxic plants list
- International Cat Care — Feeding cats
- VCA Hospitals client info on feline nutrition
- Our cat breeds encyclopedia and existing Bengal kittens guide
We get asked — cat FAQ
What’s the most dangerous thing in my home for my cat?
Lilies. All true lilies (Lilium and Hemerocallis species) cause acute kidney failure in cats — even pollen on the coat is enough. If you have a cat, do not have lilies in the house. After lilies, the main risks are paracetamol/acetaminophen (a single tablet can kill), antifreeze (sweet taste, deadly), onion/garlic family, and chocolate.
Wet food or dry?
Mostly wet, with some dry. Cats are descended from desert ancestors and have a low thirst drive — wet food is their primary water source. Dry-only diets are a long-term risk factor for urinary issues. Full breakdown in our cat diet master list.
Related reading
- Cat breeds encyclopedia
- Cat diet and toxic foods master list
- International Cat Care — Welfare and nutrition
Page last updated 17 May 2026. We re-check our pet-care content regularly and update when something changes.
