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Are cats lactose intolerant? Here’s what you need to know

How to feed your cat dairy products without upsetting their stomach

A tortoiseshell cat licking lips at food bowl
Mircea Iancu / Pixabay

You’ve surely seen those old-time drawings of kittens drinking from saucers of milk. Even movies and modern media tell stories of kindhearted folks who leave out milk for outdoor cats! It’s common knowledge that kittens drink their mother’s milk, so why shouldn’t they be able to drink cow’s milk out of the fridge?

It turns out that milk and cream may not be as nutritious to felines as we previously thought. Many cats develop a love of dairy items like cheese and butter, so is it really bad to feed your cat these items? Are cats lactose intolerant? Before you feed your cat dairy, it’s important to understand how his body works and what effect dairy can have on it. That way, you can choose food and treats that support your cat’s health and nutrition.

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Are cats lactose intolerant?

Older kitten in a yard drinking out of a bowl of milk
ChristopherPluta / Pixabay

Kittens drink their mother’s milk, which has lactose in it, and they’re just fine — but that’s because their bodies have the enzyme lactase, which lets them digest milk properly. As kittens age, their bodies produce less lactase, making it more difficult for them to digest milk. Eventually, kittens stop producing that enzyme entirely, and many become unable to digest lactose properly, meaning they’re lactose intolerant.

When a cat is lactose intolerant, they usually experience an upset stomach after consuming milk. Diarrhea is common, and some cats will also vomit. Those symptoms can start about eight hours after the cat drinks milk, so observe your cat if he has access to milk.

Some cats seem to digest milk or other dairy products just fine. Symptoms can vary between cats, and different types of dairy products contain various amounts of lactose. Some cheeses, for instance, may have less lactose than milk does, and a cat may be able to digest them more easily. No two cats are the same!

Can kittens drink regular milk?

Orange cat drinking from saucer of milk
MirasWonderland / Shutterstock

Most kittens will get all the milk they need from their mothers, but orphaned kittens or kittens whose mothers are sick may need supplemental nutrition. Regular cow’s milk can upset their stomachs since it’s very high in lactose. Cow’s milk also has a distinctly different nutritional makeup than cat’s milk, so you can’t rely on it to give kittens the nutrition they need. Instead, it’s much better to feed them a kitten milk replacer.

You’ll need to feed kittens frequently, and the timing of feedings will depend on the kittens’ age. If you’ve never cared for young kittens, quickly seek a veterinarian or professional’s help. Your vet can guide you and help you develop a feeding and care plan. They can also recommend the best product for your kittens, help you monitor their weight, and ensure they’re growing as they should.

Can cats have milk alternatives?

Cat drinking from saucer of milk
Moussa Idrissi / Pexels

If cats are lactose intolerant, can drinking dairy alternatives solve the issue? Maybe. While alternatives like almond milk, soy milk, or oat milk contain less lactose than cow’s milk, they still have little to no nutritional value for felines. The good news is that these dairy alternatives are safe for cats as long as they’re unsweetened and unflavored, but the bad news is that they can still cause digestive upset, especially in large amounts.

No milk or beverage should replace water as your cat’s primary form of hydration, and they should always get the majority of their nutrients from their daily cat food. However, a dairy alternative can be a safe ingredient to use when making homemade cat treats or sharing a bite from your plate.

Should you feed your cat cheese, milk, and other dairy?

White kitten being hand fed milk from a bottle
clarissavannini860 / Pixabay

Even though some cats may not be able to digest dairy products properly, that doesn’t mean they won’t still beg for them when you’re making a pizza or eating cereal with milk. Dairy products can lead to digestive upset, though, so while you might think you’re being nice by sharing your food with your cat, you’re really not helping him in the long run.

You can choose from plenty of dairy alternatives that are much better for your cat.

  • If your cat loves the taste of milk, then consider buying a cat milk product designed to be easy for cats to digest. These milks are lactose-free and much easier on your cat’s stomach.
  • You can also feed your cat one of many commercially available treats. They come in a wide array of options, including liquid treats and food toppers with a creamy texture similar to dairy products.
  • If you want your cat to share a taste of your human food, then consider giving him a bit of boiled chicken or cooked salmon. These treats (when fed in moderation) are healthy and safe for your cat as long as they’re cooked and not topped with butter or spices.

Milk is a core element of a kitten’s nutrition, but only when that kitten is young. Giving your cat dairy products as he ages can lead to digestive upset. Instead, always choose a food that’s safe for your cat and that he can adequately digest. Avoid anything with lactose, so all dairy products are out. When feeding your cat treats, remember that you should give him only a few daily. Even when feeding treats designed for cats, giving your cat too many can cause a sudden change to his system and upset his stomach. Indulge him in just a few treats to keep your cat healthy and to keep those foods extra-special to your cat. And remember, nothing keeps a cat hydrated better than water!

Paige Cerulli
Former Digital Trends Contributor
Paige's work has appeared in American Veterinarian, Business Insider, Healthline, and more. When she's not writing, Paige…
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