Backyard Breeder is a term used for breeders of dogs in a largely pejorative sense by the Animal Welfare community, ASPCA, larger established breeders and dog club. It is used to refer to one of the groups usually deemed not to be a Reputable Breeder.
It implies either or both of careless home breeding for non-commercial reasons or a small commercial operation that does not adhere to good breeding, care and sale practises. In contrast, larger commercial operations of a similar type are usually termed a puppy mill (especially in North America) or puppy farm.
According to Animal Welfare organizations, Backyard Breeding may be for breeding of dogs for illegitimate reasons, such as for the usually illegal sports of baiting and dog fighting or to defend venues of criminal activity. Dog fanciers generally believe that such ill-bred dogs are the reason for the bad reputation of some breeds in the public perception, and the resulting breed-specific legislation.