Every dog owner knows how fast a dog can get dirty. A good dog shampoo can wash your dog’s coat, make it suppler, detangle it easily and make it shine. How many times you wash your dog depends on the type of coat, the dog’s activity, the accommodation… In short, one dog needs a wash quicker than the other does.
In any case, never use a human shampoo on your dog, because the pH value of a dog’s skin differs strongly from yours. The best choice of shampoo depends on the coat and the reason why you want to wash your dog.