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Purebred breeders are dog breeders that intentionally breed purebred dogs specifically to continue the lineage of certain breed characteristics in dogs by mating selected canines. A purebred dog has the characteristics of the breed to which it belongs, is an offspring of two purebred parents and should be eligible for registry in the purebred association of that breed should it not have any disqualifications such as undesirable color markings. The motto of a responsible breeder of purebred dogs is to "Breed to Improve", to produce a better dog and quality pet. == History == Animal breeding as an ancient human occupation, can be traced back to domestication and dates back to at least 14 thousand yrs ago. The modern processes of purebred breeding evolved between the late 18th century and the late 20th century, influenced significantly by advancements and increased understanding of genetics and eugenics. The dogs were isolated from the larger gene pool of their species and inbreed to maintain certain characteristics. This led to smaller adult sizes compared to their wild counterparts, less acute sight and hearing, and crowding of the teeth. Smaller brains and shorter heads are also a result of neoteny as they carry juvenile characteristics into adulthood. Purebred dogs also tend to mature earlier and have greater fertility. This artificial selection for breeding led to the passing of specific physical characteristics, the creation of distinctive types of dog breeds and the purebred breeders profession. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Purebred breeders」の詳細全文を読む スポンサード リンク
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