premise: How to contact a dog breeder<br>Decide on a particular breed of dog. Before you reach out to a breeder, you will want to choose a particular breed of dog to purchase. A reputable breeder will only raise one particular type of breed of dog, so identifying your preferences will automatically narrow down your contact choices.
hypothesis: The best breeders offer a variety of dog breeds.
reason: The scenario states that the best/most reputable breeders only offer one kind of breed.