Choosing a new puppy This is a nice starter guide of things that you should consider when you are thinking about getting a puppy.
Breeds of Dogs A quick reference guide to many breeds of dogs, including photos and brief descriptions of each breed's characteristics.
American Kennel Club (AKC) The AKC is the primary registry for purebred dogs in the United States. This site has information about different breeds and a listing of upcoming dog shows and events around the country. It is important to remember when considering the purchase of a purebred puppy that AKC registration is not an indication of the health or temperament of the puppy, it merely assures purebred parentage.
Orthopedic Foundation For Animals This website is maintained by the Orthopedic Foundation for Animals which researches and documents hereditary diseases in animals. The OFA was founded in 1966 and initially focused on hip dysplasia. Today they maintain an extensive database with breed statistics on hip dysplasia, elbow dysplasia, patellar luxation, autoimmune thyroiditis, congenital heart disease, Legg-Calve-Perthes disease, sebaceous adenitis, congenital deafness and shoulder OCD.