Bull's milk (hereinafter referred to as cow's milk) contains a lot of lactose, and too much lactose will cause the dog to have diarrhea, and the dog will have diarrhea for hours and hours, which will affect the dog's health,

However, cow's milk is a good source of protein and calcium, so whether or not you can feed the cow's milk depends on the individual dog's reaction to lactose. In general, cow's milk is not recommended for puppies (2-3 months of age or younger), and it is recommended to use dog milk specially formulated for puppies.