Can dogs drink milk is a question we frequently get asked. This guide aims to provide answers to all your questions, including if milk is bad for dogs, how much milk dogs can drink, and if puppies can be given milk.

Can dogs drink milk?

The answer to this question is “it depends.” Some dogs can have a small amount of pasteurised cow’s milk and be fine. Some dogs will get an upset stomach after having a small amount of milk because they are lactose intolerant. The reality is that most dogs have mild lactose intolerance, so giving them larger amounts of milk isn’t recommended. 

Raw cow’s milk and raw goat’s milk (milk that isn’t pasteurised) is better tolerated by dogs as it still contains natural enzymes that aid digestion. Raw milk isn’t available in supermarkets or high-street stores and can only be bought from registered milk production farms.

Is milk bad for dogs?

Cows milk does contain nutritional benefits like calcium and proteins, but it’s not recommended for all dogs. Cows milk isn’t toxic to dogs, but many are intolerant to it. An intolerance means the body can’t digest something properly, or the substance irritates the digestive system.

Another reason milk should only be given in moderation is because of its high fat and sugar content. If given frequently, particularly to senior dogs who are less active, it can lead to weight gain, and even pancreatitis. Pancreatitis is the inflammation of the pancreas, and the symptoms include vomiting, diarrhoea, weight loss, and a painful stomach [1].

Feeding a raw diet is the best way to ensure your best friend gets all the nutrients they need.

Dog is licking milk from a glass cup held by a man

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Lactose intolerance in dogs

Milk and related products like cheese and yogurt are a leading source of food intolerance in puppies and dogs. Many dogs are lactose intolerant, meaning they have difficulty digesting the lactose sugar in milk because they lack the enzyme lactase. 

Intolerance isn’t the same as an allergy. A food allergy is when the body’s immune system reacts to something it’s eaten that it sees it as being harmful. 

We have a range of expert dog nutrition guides that can help you to understand what to feed your dog so they receive the best nutrition.

How to tell if your dog has lactose intolerance?

It probably won’t be obvious that your dog is lactose intolerant until you give them milk, and then how one dog reacts might not be the same as how another dog reacts. However, the most common symptoms of lactose intolerance include: 

  • Bloating
  • Gas (pumping)
  • Vomiting 
  • Diarrhoea
  • Runny/loose stools
  • Stomach pains

The symptoms of lactose intolerance can make your dog uncomfortable, so you may notice they become lethargic, shift around to find a comfortable position, appear weak, and may be irritable. 

What is the treatment for lactose intolerance?

There is no known treatment for lactose intolerance. The best way to prevent the onset of symptoms is to avoid giving your dog dairy products. 

How much milk can you give your dog?

If your dog is lactose intolerant, it’s recommended not to give your dog milk. If your dog has had milk before and has not shown any signs of intolerance, you can give a small amount as an occasional treat. For medium to large dog breeds (e.g. Border Collie or German Shepherd) a tablespoon is advised. A teaspoon is advisable for smaller dogs (e.g. Pug, Chihuahua). 

Giving a bowl of milk isn’t recommended, even for dogs who don’t show signs of lactose intolerance.

Can dogs drink milk alternatives? 

Raw goat’s milk, if you can buy it, is a healthy alternative to cow’s milk. Goat’s milk still contains lactose but at a slightly lower level than cow’s milk. 4.2% compared to 5% for cow’s milk [5]. So, it may be easier for some dogs to digest without issues. Raw goat’s milk contains probiotics, which can be depleted during the pasteurising process. 

Natural yoghurt and kefir, a fermented milk drink made from kefir grains, are better tolerated by dogs, as the bacteria used in the fermentation process feed on the lactose. So, by the time the product is ready for consumption, not much lactose is present.

Raw goat’s milk, natural yogurt, and kefir can be given as an occasional treat or as a natural probiotic source. Probiotics are healthy, live bacteria and yeasts that, among other things, help digestion, support the immune system, and can help prevent urinary tract infections [7].

Can puppies drink milk?

In the early weeks, puppies need to be with their mother and will solely feed off her milk, until they are around 3 weeks when they can start to be weaned onto solid food. Puppies produce higher levels of an enzyme called lactase, which helps to break down the lactose sugars in their mother’s milk [6]. Because of this, puppies should be able to tolerate a small amount of milk. Be on the lookout for signs of lactose intolerance. If your puppy is displaying signs, refrain from giving milk in the future. 

A nursing mother’s milk contains lactose but at a lower rate (approximately 3%) than compared to cow’s milk which is around 5%.

Three tiny puppies are drinking milk from a bowl

What can dogs drink besides water?

Water is the healthiest choice of drink for your dog. Water does more than keep your best friend hydrated. Water is needed to transport vital nutrients around the body, aid the absorption of nutrients, and support normal digestion. Water also helps to lubricate joints, improve cognitive function, and cushion the brain and spinal cord [2].

Bone broth can be added to your puppy’s or dog’s water. The aroma is irresistible to dogs, and it’s an easy way to get dogs who aren’t keen on water to stay hydrated during the warmer months. Bone broth can also be added to your dog’s raw food and made into tasty frozen lollies or gummies. 

Our dog supplements are made using natural ingredients and support your dog’s health and a range of issues, like dry eyes, ear health, fussy eating, and more.

What should dogs not drink? 

Dogs aren’t able to digest many drinks that we enjoy on a daily basis, and some can be harmful to dogs.

Many juices, soft drinks, and sports drinks contain xylitol (also known as birch sugar), which is toxic to dogs. Xylitol is a manufactured sweetener, and a small amount can increase your dog’s insulin levels, resulting in a drop in their blood sugar. If consumed in large amounts, liver damage may occur. 

Dogs are more sensitive to the effects of caffeine and if consumed in large quantities, may cause vomiting, hyperactivity, abnormal heart rate, and high blood pressure[3]. Caffeine is commonly found in coffee, tea, and sports drinks. 

Alcohol and products that contain it must never be knowingly given to dogs. Alcohol comes in 3 forms; ethanol, methanol, and isopropanol, and are all easily absorbed which can cause damage to the central nervous system, organs, and vision [4]. 

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References:

  1. Pancreatitis in dogs, pdsa: https://www.pdsa.org.uk/pet-help-and-advice/pet-health-hub/conditions/pancreatitis-in-dogs?keycode=254478&_$ja=tsid:|cid:1741649739|agid:63611028890|tid:kwd-995814226|crid:339089529978|nw:g|rnd:6212474356530373812|dvc:c|adp:|mt:e|loc:9045968&gad_source=1&gclid=CjwKCAiArLyuBhA7EiwA-qo80MeiD2S4IS0Eumu3MgNqr56JCgiJWgjba4b2T58LIaFY_HBek9rSShoC0JwQAvD_BwE
  2. The importance of water for pets and avoiding pet hydration, True Care Veterinary Hospital: https://www.truecareveterinaryhospital.com/blog/the-importance-of-water-for-pets-and-avoiding-pet-dehydration/#:~:text=The%20purpose%20of%20water%20for,the%20brain%20and%20spinal%20cord
  3. Is caffeine poisonous to dogs, Pet Poison Helpline: https://www.petpoisonhelpline.com/pet-safety-tips/is-caffeine-poisonous-to-dogs/
  4. Alcohol poisoning in dogs, petMD: https://www.petmd.com/dog/poisoning/alcohol-poisoning-in-dog
  5. Does goat’s milk contain lactose?, healthline: https://www.healthline.com/nutrition/does-goat-milk-have-lactose
  6. The truth about dairy products and pets, petMD: https://www.petmd.com/cat/conditions/digestive/truth-about-dairy-products-and-pets
  7. Probiotics for dogs: Do they work?. petMD: https://www.petmd.com/dog/general-health/probiotics-dogs-what-you-need-know