Cats hold a special place in our hearts. The sound of a purring cat can instantly melt you. You’d probably do just about anything for your feline companion — stocking the pantry with treats, buying toys they’ll ignore in favor of a shoelace, canceling plans because Saturday night with Netflix and your cat just feels right.

The point is, we spoil our cats. And every now and then, that might include pouring them a bowl of milk. It feels like a classic, natural thing to do. But should you?

Do Kittens Drink Milk?

Yes — but not the kind you’re thinking of. Kittens drink their mother’s milk, which is specially formulated with the nutrients they need to develop into healthy adult cats. This is true of most mammals. Kittens typically nurse until they’re weaned at around 8 to 10 weeks old, at which point they transition to solid food.

The important distinction here is between a mother cat’s milk and the pasteurized cow’s milk in your refrigerator. They’re not the same thing, and your cat’s body doesn’t treat them the same way.

Most Adult Cats Are Lactose Intolerant

Here’s what most people don’t realize: the majority of adult cats can’t properly digest milk. Milk contains a sugar called lactose, and kittens produce an enzyme called lactase that helps them break it down. As cats mature and stop nursing, most of them gradually lose the ability to produce enough lactase.

The result is lactose intolerance. When a lactose-intolerant cat drinks milk, the undigested lactose ferments in the gut, leading to stomach cramps, bloating, gas, diarrhea, and general discomfort. It’s not life-threatening in most cases, but it’s certainly unpleasant for your cat.

What About Cow’s Milk Specifically?

Cow’s milk is particularly problematic because it contains higher levels of lactose than cat’s milk. According to several pet nutrition experts, cow’s milk also doesn’t provide the right balance of nutrients for cats. It’s essentially empty calories for them — it fills them up without giving them what they need.

Even cats that seem to tolerate milk without visible symptoms may still be experiencing some degree of digestive stress. The absence of obvious diarrhea doesn’t necessarily mean the milk is sitting well.

Are There Safe Alternatives?

If your cat loves the taste of milk and you want to give them an occasional treat, there are cat-specific milk products designed to be lactose-free. These are formulated to be easier on a cat’s digestive system while still giving them the flavor they enjoy.

Another option is a small amount of plain, unsweetened yogurt. The fermentation process reduces lactose content, and some cats tolerate it better than straight milk. But even with these alternatives, moderation is key. These should be occasional treats, not a regular part of your cat’s diet.

The Bottom Line

The image of a happy cat drinking from a saucer of milk is one of the most enduring — and misleading — ideas in pet culture. The truth is that most adult cats are better off without it. Fresh, clean water should always be your cat’s primary drink.

If you’ve been giving your cat milk and they seem fine, it’s still worth scaling back and observing whether their digestion improves. And if you want to treat them, reach for a lactose-free cat milk product instead.

Your cat doesn’t need milk. But they absolutely need you to make informed choices about what goes into their bowl.