Not recommended. Many adult dogs can't digest lactose well, so milk often causes diarrhoea and gas. A small lick is unlikely to hurt, but it shouldn't be a regular drink.

Can Dogs Eat Milk? Not recommended

If your dog ate milk

Expect a possible upset stomach. Offer water and call your vet if diarrhoea lasts more than a day.

Call your vet or a 24/7 animal poison line now: ASPCA Animal Poison Control (888) 426-4435 · Pet Poison Helpline (855) 764-7661

Why

Puppies drink their mother's milk, but most dogs make less lactase — the enzyme that digests milk sugar — as they grow up.

Sources

ASPCA — People Foods to Avoid Feeding Your Pets

General information checked against published veterinary sources. Every dog is different — ask your vet before changing its diet, and call them if it seems unwell.