Can cats drink milk?
Last reviewed
Not a treat — most cats are lactose-intolerant.
Not for most cats. Many cats are lactose-intolerant and develop gastrointestinal problems from dairy, which is why Cornell's guidance does not recommend milk as a treat. The saucer of milk is a story image; fresh water is the drink a cat actually needs.
- Why take care
- A large bowl of milk is far more likely to cause problems than a teaspoon-sized taste, but even a small amount offers no nutritional benefit an adult cat needs.
How to give milk safely
Don't offer cow's milk as a regular treat or hydration source — fresh water is what cats need. A tiny amount of lactose-free cat milk is a lower-risk option if you want to share a dairy taste, but it isn't necessary. See a vet if diarrhea persists or the cat seems unwell.
Signs the milk did not agree with your cat
- Diarrhea
- Vomiting
- Bloating, gas, or abdominal discomfort
Why is milk bad for cats?
When cats drink milk, most cannot digest it properly — they do not have enough of the enzyme that processes milk sugars. The result is the diarrhea, vomiting, bloating and gas listed above, and it is why milk is not a hydration plan.
Hill's makes the same point: most cats lack the enzyme responsible for processing milk sugars, which is what leaves the lactose for the gut to deal with.
Can cats drink lactose-free milk?
Only as an occasional taste, if at all. Lactose-free formulas made for cats are the lower-risk way to share a dairy taste — but "not necessary" still applies, and the water bowl does the real work.
What are the signs a cat should not have had milk?
Diarrhea, vomiting, bloating, gas or abdominal discomfort. See a vet if diarrhea persists or your cat seems unwell — an upset that passes quickly is common; persistent symptoms are not a wait-and-see.
A taste that goes down fine once is not a clearance for next time, either.
What should cats drink instead?
Water — fresh and plain, which is exactly why milk fails the test: it replaces the one drink that matters.
For foods rather than drinks, start at the food list; a treat with no lactose caveat is banana. And it is worth knowing how each claim here was checked — the method is on how we grade the evidence.
Sources
1.Cornell Feline Health Center — Feeding Your Cat
Show the quoted lines
Milk is not generally recommended as a treat for cats, as many cats are lactose-intolerant and can develop gastrointestinal problems if fed dairy products.
2.Hill's Pet — Can Cats Drink Milk?
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When cats drink milk, most are unable to digest it properly, as they don't have enough of the enzyme responsible for processing milk sugars.
How sources are picked: methodology. Spot an error? Email hello@meowledge.app.