Few dogs are as emotionally engaging or physically elegant as the greyhound. None are as swift. Its unmatched fleetness is key to the breed's longtime survival. Bred to hunt, the greyhound has a lineage extending back 8,000 years. Throughout their history, greyhounds have been the companions of kings and an inspiration to writers and artists alike. Today hundreds of young and healthy purebred greyhounds that do not make the grade on U.S. racetracks...