Kittens produce lactase to digest their mother's milk, but most cats produce much less after weaning. The ASPCA notes dairy can cause diarrhoea and digestive upset. Milk also adds calories. Never give kittens cow's milk as a replacement: use a kitten milk replacer.
Best avoided
It's best avoided. Most adult cats are lactose intolerant, and cow's milk often causes diarrhoea, gas and stomach upset. Cats only need water. If you want to treat your cat, use a lactose-free 'cat milk'.
This guide is general information, not a diagnosis. If your pet seems unwell, or you're worried, call your vet.
What you need to know
If your cat ate some
- A few laps are unlikely to cause harm; watch for diarrhoea over the next day.
Signs to watch for
- Diarrhoea
- Vomiting
- Gas or a swollen tummy
Collapse, seizures, difficulty breathing or pale gums are emergencies: go to the nearest vet straight away.
Other foods for cats
Also best avoided
Sources
- ASPCA: People foods to avoid feeding your pets
- Cornell Feline Health Center: Experts address feline nutrition
We check guides against veterinary sources and update them when guidance changes. How we write and review.
Questions.
Why do cats like milk if it's bad for them?
They like the fat. Lactose-free cat milk lets them enjoy it without the upset.
