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Can Cats Drink Buttermilk? Vet-Approved Diet Facts & FAQ

Buttermilk in a pitcher and glass on the table
Image Credit: Mehmet Cetin, Shutterstock
Last Updated on November 16, 2023 by Lindsey Lawson

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	Dr. Tabitha Henson (Vet) Photo

Reviewed & Fact-Checked By

Dr. Tabitha Henson (Vet)

The information is current and up-to-date in accordance with the latest veterinarian research.

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Cats eagerly lapping up milk is a picture etched in most of our minds from old movies and children’s books. Milk used to be considered healthy for cats until we gained better knowledge and understanding of our beloved companions’ dietary needs.

Buttermilk is a common staple in households, especially those that do a lot of home cooking. One might wonder whether cats can drink buttermilk. After all, it has fewer calories and is lower in fat. Like with regular milk though, buttermilk is also not recommended for cats. Let’s take a closer look into the reason behind this.

divider-catclaw1What Is Buttermilk, Exactly?

Unlike the name suggests, buttermilk does not contain butter. Traditional buttermilk is what is left over once whole milk has been churned into butter. This is not the type of buttermilk we use in the western world but is common in countries such as India, Pakistan, and Nepal. The buttermilk we know, and use is fermented milk that consists mostly of water, the milk sugar lactose, and the milk protein casein.

The fermentation of buttermilk leaves a tangy taste, making it a great addition to bread, biscuits, pancakes, waffles, and a variety of other baked goods. Buttermilk can be a drink, but most often, people opt against this due to the bitter taste.

Glass of milk
Image Credit: Pezibear, Pixabay

Why Can’t Cats Have Milk or Buttermilk?

The only type of milk a cat needs is its mother’s milk during kittenhood or a milk replacement if a kitten has yet to be weaned and there is no mother cat available to nurse. It is not recommended to offer cats any type of other milk, including buttermilk.

As kittens, their systems produce high levels of the enzyme lactase, which breaks down the lactose sugars that are found in their mother’s milk. As they grow and age, they produce less of this enzyme, making the digestion of milk and other dairy products much more difficult. It is not uncommon for cats to end up lactose intolerant, just like humans.

Potential Side Effects of Dairy Consumption

Some cats may be able to tolerate small amounts of milk or other dairy products without any issues. That doesn’t mean it should be offered, as you can expect your veterinarian to advise against it regardless. Consuming too much milk or dairy products can cause digestive upset. Some common symptoms your cat may experience after consuming dairy products include:

  • Gas
  • Upset stomach
  • Bloating
  • Vomiting
  • Diarrhea
  • Constipation
  • Increased thirst
  • Dehydration
  • Increased heart rate
  • Dry gums
Sick sad cat lying on the bed
Image Credit: Zhuravlev Andrey, Shutterstock

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What Can Cats Drink Besides Water?

Now that you know cats should not be offered any dairy drinks, it may leave you wondering if there are any other drinks your cat can lap up safely, except for water, of course. The truth is, your cat is an obligate carnivore, which means they get all their nutritional needs through meat sources. Interestingly, wild cats get most of their water content and hydration directly through their prey. Since this isn’t reasonable in the home, you do have to keep fresh, clean water available always.

Mother’s Milk

This may be the most obvious, but kittens will need to nurse from their mothers until they are fully weaned. A mother cat’s milk is only needed during the first stages of life and kittens will quickly outgrow the need.

fluffy cat pregnant give birth and new born baby kittens_iarecottonstudio_shutterstock
Credit: iarecottonstudio, Shutterstock

Milk Replacement

Milk replacement is an option for those that have kittens that are either unable to nurse their mother or do not have a mother available for nursing. This should only be offered to kittens that are not yet of weaning age, as there is no reason to offer milk replacement to weaned or adult cats unless you were specifically advised to by a veterinarian.

Bone Broth

Bone broth is a nice little treat in the form of a drink that can be offered to your kitty. You need to make sure you offer unsalted, pure bone broth that is free of any other ingredients or seasonings. Not only is it easy to make at home, but it’s also a great, nutritious drink you can offer on occasion.

Pregnant White Cat
Image Credit: Boy77, Shutterstock

Goat’s Milk

While it is still not recommended as it is a dairy product, goat’s milk tends to be much easier for cats to digest. This is due to goat’s milk containing more small- and medium-chain fatty acids rather than long-chain fatty acids.  If offered sparingly, goats’ milk would be a much safer alternative to regular cow’s milk or buttermilk in very small amounts, though it is not necessary.


Even though milk was touted as a great drink to offer cats, most veterinarians will advise against offering your cat any dairy products, including buttermilk, since cats cannot digest lactose properly. If you have been offering your cat buttermilk, consider opting for something much healthier like plain bone broth, or just stick to plain old fresh water. As always, it’s best to ask your veterinarian if you’re not sure which treats to offer your cat.

Related Read:

Featured Image Credit: Mehmet Cetin, Shutterstock

About the Author

Lindsey Lawson
Lindsey Lawson
Lindsey and her husband enjoy traveling the US with their kids and photographing wildlife. Her passion is to educate others on the importance of proper animal care, with an emphasis on reptiles and exotics since their care requirements can be much more complex. She is also a huge advocate for bully breeds. She feels most at home in the forest either on horseback or in hiking boots.

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