Can Cats Drink Buttermilk?

Buttermilk has become an increasingly popular beverage among humans for its thick texture and tangy flavor. This cultured dairy drink is often used in cooking and baking, but is it safe for cats to drink?

Many cat owners wonder if they can share a bit of their buttermilk with their feline friend or if they should avoid giving cats buttermilk altogether. The answer depends on a few key factors.

In this comprehensive guide, we’ll cover everything you need to know about cats and buttermilk, including:

  • What is Buttermilk?
  • Is Buttermilk Safe for Cats?
  • Benefits of Buttermilk for Cats
  • Risks and Side Effects of Buttermilk for Cats
  • How Much Buttermilk Can Cats Drink?
  • Tips for Serving Buttermilk to Cats
  • Signs of an Allergic Reaction
  • Better Alternatives to Buttermilk for Cats

Let’s dive in and find out if cats can enjoy buttermilk as a tasty treat!

What is Buttermilk?

Before determining if buttermilk is safe for cats, let’s first understand what buttermilk is.

Buttermilk is a fermented dairy liquid that is left over after butter is churned from cream. The process of churning causes the milk proteins and fat to separate, leaving a tangy, acidic byproduct known as buttermilk.

Traditional buttermilk contains traces of butter due to the churning process. However, most commercial buttermilk today is made by adding bacterial cultures to milk, which thickens it and gives it a signature tangy flavor.

Buttermilk has a smooth, creamy texture but packs a tart, acidic taste. It has a thicker consistency compared to regular milk. The tanginess comes from the lactic acid created by the bacteria added to the milk.

Now that we know what buttermilk is and how it’s made, let’s explore how suitable and safe it is for feline consumption.

Is Buttermilk Safe for Cats?

Buttermilk is generally safe for cats to consume in small quantities as an occasional treat. The key things to consider are your cat’s lactose tolerance, nutritional needs, and any pre-existing conditions.

Here’s a quick overview of how buttermilk may affect cats:


  • Contains nutrients like protein, vitamins, and minerals
  • Provides hydration
  • May improve digestion
  • Adds variety to diet


  • Can cause digestive upset due to lactose
  • High in calories and fat
  • May trigger food allergies
  • Can cause complications in cats with conditions like diabetes

As with any new food, it’s best to introduce buttermilk slowly and carefully monitor your cat’s reaction. Only give buttermilk sparingly and discontinue use if any adverse effects occur.

It’s also important to choose plain, unsweetened buttermilk and avoid flavored or low-fat varieties, which may contain artificial ingredients.

Benefits of Buttermilk for Cats

Buttermilk may offer a few benefits for cats if given in moderation. Here are some of the potential upsides:

1. Provides protein: Buttermilk contains high-quality proteins that can contribute to your cat’s daily protein intake. Protein is essential for maintaining muscle mass and supporting tissue repair.

2. Contains vitamins and minerals: Buttermilk is a source of various vitamins and minerals like vitamin B12, riboflavin, calcium, and phosphorus. These micronutrients support immune function, metabolism, bone health, and enzyme production in cats.

3. May improve digestion: The probiotics in buttermilk may aid digestive health in some cats by promoting good gut bacteria. Buttermilk’s thick texture can also alleviate nausea. Always consult your vet first.

4. Hydrates the body: The liquid content in buttermilk can contribute to your cat’s daily fluid needs and prevent dehydration. This helps flush out toxins in the body.

5. Provides a dietary variety: Small amounts of buttermilk can add some flavor and nutritional variety to your cat’s usual diet. This may encourage picky eaters to eat.

Buttermilk certainly offers some nutritional value for cats. However, there are also some potential downsides to consider before adding it to your cat’s diet.

Risks and Side Effects of Buttermilk for Cats

While buttermilk may seem like a tasty snack, there are some risks associated with giving buttermilk to cats:

1. Lactose intolerance: Most cats are lactose intolerant, which means they lack the enzyme lactase needed to properly digest milk sugars. The lactose in buttermilk can cause digestive issues like diarrhea, gas, or vomiting.

2. High in calories: Buttermilk is high in calories and fat, which can lead to weight gain and obesity if given too often. Obese cats have an increased risk of diseases like diabetes and arthritis.

3. Allergies: Some cats may be allergic or intolerant to the proteins found in dairy products. Buttermilk allergies can trigger itchy skin, ear infections, and other signs.

4. Complications with health conditions: Buttermilk is not ideal for cats with certain medical conditions like diabetes, kidney disease, gastrointestinal disease, or pancreatitis. Always consult your vet first.

5. Artificial additives: Flavored or low-fat buttermilk may contain artificial sweeteners, thickeners, and preservatives that can be harmful to cats when ingested.

To be on the safe side, buttermilk should only be an occasional snack for healthy cats. It’s important to monitor for any troubling symptoms after introducing it.

How Much Buttermilk Can Cats Drink?

When served in moderation, most healthy cats can enjoy a few licks or a small saucer of buttermilk. The exact amount suitable for your cat depends on factors like size, age, and overall health status.

Here are some general buttermilk serving guidelines for cats per day:

  • Kittens under 6 months: Up to 2 teaspoons
  • Small cats: Up to 2 tablespoons
  • Medium cats: Up to 3 tablespoons
  • Large cats: Up to 1/4 cup

Start with just a teaspoon first to test your cat’s tolerance. Gradually increase to the recommended serving sizes if no digestive issues occur.

Divide buttermilk into portions throughout the day rather than one large serving. Also, make sure your cat has access to plenty of fresh water to stay hydrated.

Stop giving buttermilk if you notice any discomfort, vomiting, diarrhea, or other concerning symptoms. Seek veterinary advice if symptoms persist beyond 24 hours.

Tip: Choose plain, full-fat buttermilk and avoid low-fat, non-fat, or flavored varieties. Opt for pasteurized buttermilk from the refrigerated section of stores rather than the shelf-stable, aseptic boxed buttermilk which contains preservatives.

Tips for Serving Buttermilk to Cats

If you want to share a bit of your buttermilk with your curious cat, here are some tips for serving it safely:

  • Serve buttermilk at room temperature or slightly warmed. Cold buttermilk from the fridge may cause stomach upset.
  • Pour a couple tablespoons into your cat’s water bowl or a shallow saucer. Offer it separate from their main meals.
  • Introduce slowly with just a teaspoon first. Gradually increase to the recommended serving amount based on your cat’s size.
  • Only leave buttermilk out for 30 minutes to 1 hour to prevent spoilage. Discard any leftovers.
  • Rinse your cat’s bowl with water after each serving to prevent bacterial growth.
  • Choose a ceramic or stainless steel bowl instead of plastic which can absorb smells.
  • Never force your cat to drink buttermilk. Let them lap it up voluntarily to prevent aspiration.
  • Keep an eye on your cat for any vomiting, diarrhea, or other reactions afterwards.
  • Stop serving if your cat shows disinterest or adverse effects. Consult your vet if symptoms concern you.

With a few precautions and close supervision, many cats can enjoy buttermilk in moderation without issue. Pay attention to your individual cat’s response.

Signs of an Allergic Reaction

Some cats may be allergic or intolerant to the proteins and lactose found in dairy products like buttermilk. Signs of an allergic reaction to watch out for include:

  • Itchy skin or ears
  • Hives or rash
  • Excessive licking of the skin
  • Vomiting or diarrhea
  • Congestion or coughing
  • Swelling of the face and throat
  • Trouble breathing

If your cat shows any severe symptoms like difficulty breathing, facial swelling, or collapse, seek emergency vet care immediately as these can indicate anaphylaxis.

Milder symptoms can be managed by discontinuing buttermilk and monitoring your cat closely. Contact your vet if symptoms concern you or persist beyond 24 hours.

Keep an emergency epinephrine pen on hand if your cat has a known milk allergy. Avoid all dairy products in the future if your cat has an intolerance.

Better Alternatives to Buttermilk for Cats

While the occasional small treat of buttermilk is fine for most healthy cats, it shouldn’t be a regular part of their diet. Here are some healthier, safer alternatives:

  • Plain, unsweetened yogurt: Contains less lactose than buttermilk. Offers probiotics.
  • Meat broth: Provides moisture and flavor without the dairy.
  • Canned fish: Gives protein and omega fatty acids. Watch for bones.
  • Chicken/beef baby food: Contains more digestible protein sources.
  • Bone broth: Provides electrolytes, vitamins, and minerals.
  • Cat milk/treats: Made specifically for cats with digestive enzymes.

For a regular calcium boost, feed small amounts of ground egg shell instead of dairy products. Always check with your vet before making any major dietary changes.

With some precautions, and given in moderation, many cats can enjoy buttermilk as an occasional treat without issues. Pay close attention to your individual cat’s response. Ultimately, there are healthier alternatives than dairy products for cats. Buttermilk should only be a sparse treat in a well-balanced feline diet.

The Bottom Line

Buttermilk is generally safe for cats to consume in small amounts as an infrequent snack. The probiotics and nutrients in buttermilk can benefit cats in moderation. However, buttermilk also contains lactose and calories that may cause digestive upset or weight gain in large amounts.

Carefully introduce buttermilk slowly while looking out for any troubling symptoms. Avoid giving buttermilk to kittens, cats with medical conditions, or suspected milk allergies without vet approval. Only serve small portions of plain, full-fat buttermilk occasionally.

While buttermilk may be an enjoyable snack, stick to cat-friendly foods and treats as the mainstay of your kitty’s diet. With some care and moderation, many felines can lap up a bit of buttermilk as a special reward. Just be sure to monitor your cat’s individual response.