Can cats eat milk?
Quick answer: Not recommended — milk is best avoided for cats.
Quick verdict
Caution
Key risk
Most adult cats are lactose intolerant; milk commonly causes stomach upset and diarrhoea.
Why
Despite the image, milk often upsets cats.
Can cats eat milk, and why?
Despite the image, milk often upsets cats. Most adult cats are lactose intolerant; milk commonly causes stomach upset and diarrhoea.
Cats are obligate carnivores: they must get most of their nutrition from meat and need nutrients such as taurine that only animal products provide. They lack some enzymes for processing plants and carbohydrates, so fruit and veg offer little benefit and can upset their stomach; many cats are also lactose intolerant.
Warning — what to watch for
Most adult cats are lactose intolerant; milk commonly causes stomach upset and diarrhoea.
If your cat has eaten milk, don’t wait for symptoms — contact your vet immediately, or call the Animal PoisonLine on 01202 509000 (24/7, UK). Signs of a problem can include vomiting, diarrhoea, drooling, lethargy, tremors or loss of appetite.
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Frequently asked questions
Can cats eat milk?
Caution. Despite the image, milk often upsets cats.
What happens if my cat eats milk?
Most adult cats are lactose intolerant; milk commonly causes stomach upset and diarrhoea. If your cat has eaten milk, contact your vet or the Animal PoisonLine (01202 509000) straight away — don’t wait for symptoms.
Is milk poisonous to cats?
Caution. Despite the image, milk often upsets cats.
Free printable: safe & toxic foods for cats
milk is just one food — get the full one-page checklist of what’s safe, fine in moderation, or dangerous for cats. Vet-sourced, yours to print and keep.
Check milk for another pet
Sources
Our verdict on whether cats can eat milk draws on established UK and US veterinary and welfare organisations. Individual pets, quantities and preparation vary — always confirm with your own vet.