Well, lactose is actually a kind of sugar. Not just one single sugar, but two sugar molecules chemically linked together. In order for a dog to digest milk, the lactose must first be broken apart into its two more basic, easy-to-absorb sugars.
A dog’s body must be able to produce its own special lactose-splitting enzyme. An enzyme known as lactase, and that’s one thing very few dogs can reliably do. Dogs Can Suffer from Lactose Intolerance without lactase. A dog simply cannot digest dairy products and acute intestinal symptoms nearly always arise....So if you are feeding your dog anything dairy related PLEASE STOP....Hope this helps:)
Can you be a bit more specific?