The breeder or breeders who initially establish a breed, do so by selecting individual animals from within the groups gene pool that they see as having the necessary qualities needed to enhance the breed model they are aiming for. These animals are referred to as “breed foundation”, or “breed origination”. Further, the breeder mates the most desirable from his point of view representatives, aiming to pass such characteristics to their progeny. This process is known as selective breeding. A written description of desirable and undesirable breed representatives is referred to as a breed standard.

Dog breeding is the practice of mating selected specimens with the intent to maintain or produce specific qualities and characteristics.

Dogs reproduce without human interference, so their offsprings' characteristics are determined by natural selection. Domestic dogs may be intentionally bred by their owners. [1] A person who intentionally mates dogs to produce puppies is referred to as dog breeder. Breeding relies on the science of genetics, so the breeder with a knowledge of canine genetics, health, and the intended use for the dogs attempts to breed suitable dogs.

The American Kennel Club (or AKC) is a registry of purebred dog pedigrees in the United States. Beyond maintaining its pedigree registry, this kennel club also promotes and sanctions events for purebred dogs, including the Westminster Kennel Club Dog Show, an annual event which predates the official forming of the AKC, the National Dog Show, and the AKC/Eukanuba National Championship.