Dairy
Can cats eat milk?
Most adult cats are lactose-intolerant; cow's milk commonly causes diarrhoea.
Portion: No cow's milk; up to 1–2 tablespoons of lactose-free cat milk occasionally.
The short answer
Despite the stereotype, milk isn't good for most cats. After weaning, cats lose much of their ability to digest lactose, so a saucer of cow's milk often leads to diarrhoea and gas. If you want to offer a treat, lactose-free 'cat milk' is a better choice — in small amounts, because it still adds calories. Kittens need mother's milk or kitten formula, never cow's milk.
Why the verdict
Lactase production drops sharply after weaning. Undigested lactose ferments in the colon and pulls water into the gut, producing loose stools and discomfort. Milk also contains fat and calories that add up fast for a small animal.
How to prepare it
- Prefer water — always available and fresh.
- If offering milk, choose lactose-free cat milk.
- A tablespoon is a portion.
- Never use cow's milk to feed orphaned kittens — use kitten milk replacer.
Signs of trouble
- Diarrhoea
- Vomiting
- Gas, bloating, abdominal discomfort
Milk & cats: FAQ
Can kittens drink cow's milk?
No. Use a commercial kitten milk replacer and talk to your vet.
Can cats drink lactose-free milk?
Lactose-free milk is better tolerated, but it's still a treat — keep it to a tablespoon or two.
Can cats drink oat or almond milk?
Not recommended; they're unnecessary and some contain sweeteners or additives.
Related foods
See every food that’s toxic to cats →
Sources
- Cornell Feline Health Center — Feeding Your Cat (accessed 2026-09-29)
- ASPCA Animal Poison Control — People Foods to Avoid Feeding Your Pets (accessed 2026-09-29)
Last updated 2026-09-29. We are not veterinarians: this guide summarises published veterinary references and is not a substitute for advice from your vet. See our methodology and disclaimer.