Backyard Breeder is a general term, often considered derogatory, used to describe people who breed animals, often without Pedigrees . In some cases the animals are inbred narrowly for looks with little regard to health back yard breeders tend to focus on "temperment" And "cute babies" as an excuse to breed lower quality animals. I(f you are not bettering the species than there really is no point to breeding the more positive term, "reputable breeder" describes operations that use responsible methodology and practices.
It implies either or both of careless home breeding for non-commercial reasons or a for-profit small commercial operation that does not adhere to good breeding, care and sale practices.In dogs backyard breeders are often called a puppy mill .
This type of breeder usually exibits
Ignorance of selective breeding goals and techniques, and lack of familiarity with the breed standard of the type of animal being bred.
Exclusive focus on the breed standard involving little genetic screening or co-efficient of Inbreeding calculations. (like breeding for temperment) temperment is not primarily genetic it is learned.
Lack of adequate veterinary care and maintenance.
Excessive breeding from individual females, to the detriment of their health.
Sale of animals with genetic disorders or undisclosed illnesses before they become evident to buyers.
Lack of screening of potential owners or the provision of suitable information to prevent buyers from purchasing an animal that may be inappropriate for them or their lifestyle.
Breeding without concern for the possibility of finding homes, though commercial means or otherwise, for offspring, thus adding to the population of unwanted animals, there are thousands of chinchillas in rescues out there
That is what a backyard breeder is