A male breeding dog is called a stud dog. There are multiple factors that go into stud dog selection—selecting for fertility, ease of breeding, litter size and the ability to correct a weakness we see in our female dogs. We select new genetics because of conformation, size, and the ability to reproduce the traits in offspring. Much time goes into looking at parents and siblings as stud dogs are selected and purchased as puppies. We keep our own female dogs as we can raise better females with known maternal traits for whelping, litter size, and ease of handling than we can buy. Replacement females will be selected out of these stud dogs, so select well. Remember, management should not stop after the purchase.