Can Dogs Drink Milk?
A few tablespoons of plain milk as an occasional treat won't harm most dogs, but milk is not a good idea as a regular drink. Many adult dogs are lactose intolerant and get gas, diarrhoea or vomiting from it, and milk is high in fat and sugar, which can contribute to weight gain and pancreatitis. Puppies should only have their mother's milk or a proper puppy milk replacer, never cow or goat milk.
Milk isn’t toxic to dogs, so a small amount as an occasional treat is usually fine - think a couple of tablespoons, not a bowlful. But milk is far from an ideal drink for dogs, and for many it causes stomach upset. Water is, and always will be, the only drink your dog actually needs.
Why milk upsets so many dogs
The issue is lactose, the natural sugar in milk. To digest it, the body needs an enzyme called lactase. Puppies make plenty of lactase so they can digest their mother’s milk, but once they are weaned, production drops - and many adult dogs end up lactose intolerant to some degree. Without enough lactase, the undigested lactose ferments in the gut.
Signs of lactose intolerance after drinking milk include:
- Diarrhoea or loose stools
- Vomiting
- Gas and bloating
- Abdominal pain
- A drop in appetite
These usually show up within a few hours of drinking it.
How much milk is safe?
If your dog tolerates dairy, a few tablespoons of plain cow’s or goat’s milk now and then is generally acceptable. What you should avoid is giving a full bowl, or making milk a daily habit. Beyond the lactose problem, milk is high in fat and natural sugars, and too much fat can trigger pancreatitis - a painful and potentially serious inflammation of the pancreas - as well as contribute to obesity.
What about puppies?
Puppies need their mother’s milk, or, if they are orphaned or the mother can’t nurse, a commercial puppy milk replacer formulated for dogs. Do not feed cow’s or goat’s milk to a puppy - it is not balanced for their needs and can cause diarrhoea in a young animal that can dehydrate quickly. If you are hand-rearing a puppy, speak to your vet about the right formula and feeding schedule.
What about cheese, yoghurt and ice cream?
- Plain yoghurt is often better tolerated than milk because some of the lactose is already broken down; a small spoonful can be a fine treat for many dogs.
- Cheese is popular as a training reward but is high in fat and salt, so keep it tiny.
- Ice cream is best avoided - it is sugary, fatty, and some flavours contain chocolate or xylitol, both of which are toxic to dogs.
The bottom line
A lick of milk won’t hurt a dog that tolerates it, but there’s no nutritional reason to offer it, and plenty of dogs feel worse for it. If your dog gets an upset stomach after any dairy, stop offering it and stick to fresh water. Check with your vet before adding dairy to the diet of a dog with a sensitive stomach or a history of pancreatitis.
References
- Can Dogs Drink Milk? Is Milk Bad for Dogs? - American Kennel Club
- Can Dogs Drink Milk? - PetMD
- Food Intolerance in Dogs - VCA Animal Hospitals
This article is general information, not veterinary advice. Check with your vet before adding new foods, especially if your dog has a medical condition.
