To locate a reputable, responsible breeder, ask an adoption counselor at your local shelter for recommendations. Your veterinarian is also an excellent source of information. Personally visit the kennel and ask to see the puppy's parents. This is extremely important, so that you can evaluate the conditions in which the puppy has lived, the character of the breeder and the condition of the puppy's parent or parents. Healthy parents have healthy puppies, devoid of the physical and psychological genetic defects caused by inbreeding or ignorance of good breeding practices.
Legitimate facilities encourage prospective owners to visit.