Can Dogs Drink Milk? Yes — But Many Dogs Are Lactose Intolerant

Milk is not toxic to dogs, but it's not as straightforward as many other human foods. The key issue is lactose — and many dogs simply can't digest it well. Here's what you need to know before sharing a bowl of milk with your pup.

Is Milk Safe for Dogs?

In small amounts, cow's milk is generally safe for dogs that can tolerate lactose. It provides calcium, protein, and vitamins A, D, and B12. However, dogs produce much less lactase (the enzyme that breaks down lactose) than humans, making many dogs lactose intolerant to varying degrees.

Signs of Lactose Intolerance in Dogs

If your dog is lactose intolerant, you'll typically see symptoms within 12 hours of consuming milk:

• Loose stools or diarrhea
• Vomiting
• Gas and bloating
• Abdominal discomfort
• Decreased appetite

If your dog shows these signs after drinking milk, eliminate dairy from their diet and consult your vet.

How Much Milk Can a Dog Have?

If your dog tolerates lactose well, a few tablespoons of plain cow's milk as an occasional treat is generally fine. Avoid giving a full bowl — even lactose-tolerant dogs can experience GI upset from larger amounts. Never give flavored milk, chocolate milk, or milk with added sugar.

Lower-Lactose Dairy Alternatives

If your dog loves dairy but has trouble with milk, lower-lactose options are better tolerated:

• Plain low-fat yogurt (contains beneficial probiotics)
• Cottage cheese (lower lactose than milk)
• Hard aged cheeses (lower lactose than soft cheeses)

For dogs with ongoing digestive sensitivity, Royal Canin Probiotics for Dogs is a vet-developed powder supplement that supports digestive and immune health — easy to mix into food daily for dogs of all ages.

Final Thoughts

Milk is not toxic to dogs, but lactose intolerance is common and can cause real discomfort. Start with a very small amount to test your dog's tolerance, and if they show any digestive symptoms, stick to lower-lactose dairy options or skip dairy altogether.