Fancy rabbit breeds are often purchased from pet stores, private breeders, and fanciers. Breeding colours are also a problem for many beginner breeders. Some puppies are sold by dealers masquerading as authentic breeders. Breeding success is much lower for first-time mothers relative to experienced breeders. Dog owners can avoid contributing to this industry by researching different dog breeders. This led to the development of treeing hounds by hunters and dog breeders. Nivkh were traditionally fishermen, hunters, and dog breeders. The merle Pomeranian is a recent colour developed by breeders. Today, horse racing provides jobs for about 20,000 people including horse breeders, groomers, and trainers. Unconventionally, Darwin asked questions of fancy pigeon and animal breeders as well as established scientists. Unconventionally, he sought information from animal breeders. The Palomino Horse Breeders of America (PHBA) has stricter requirements. This gave rise to a good deal of displeasure among Danish horse breeders. There are several genetic diseases of concern to Akhal-Teke breeders. Due to inbreeding by disreputable breeders there is an increased incidence of disease.