Safe? Toxic? Risky? Sorted.

Allium family plants (onion, garlic, chives, leeks) are toxic to cats in ALL forms: raw, cooked, powdered, dehydrated, and hidden in sauces and seasonings. Cats are more sensitive to allium toxicity than dogs. Even small amounts consumed repeatedly can cause hemolytic anemia (the cat's own immune system destroys its red blood cells). The danger is the HIDDEN sources: garlic powder in deli meat, onion in pre-made gravy, chives on baked potatoes.

Grapes and raisins are toxic to cats (and dogs). The exact compound responsible is still unknown, but the effect — acute kidney failure — is well-documented. There is no established safe dose. Some cats eat a grape and are fine; others eat one and develop kidney failure. Because the reaction is unpredictable and potentially fatal, the recommendation is zero tolerance: no grapes, no raisins, ever.

The image of a cat lapping up a saucer of milk is one of the most persistent myths in pet care. Most adult cats and many kittens lose the enzyme (lactase) needed to digest lactose after weaning. Cow's milk, cream, and soft cheeses cause digestive upset: diarrhea, gas, bloating. Hard cheeses (cheddar, Swiss) have less lactose and may be tolerated in tiny amounts. But dairy is never NECESSARY for cats and the safest approach is to skip it entirely.

The confusion is real because the answer IS nuanced. Human-grade canned tuna is not toxic to cats, but it's not a balanced food either: too much sodium, no taurine supplementation (cats need taurine or they go blind and develop heart failure), and potential mercury accumulation. A teaspoon as a rare treat is fine. A can as a meal replacement is dangerous over time. The food list gives EXACT portions for YOUR kitten's weight, not vague advice.