Horse breed been produced. Such restrictions have led to legal challenges in the United States, sometime based on state law and sometimes based on antitrust laws. Horses can crossbreed with other equine species to produce hybrids. These hybrid types are not breeds, but they resemble breeds in that crosses between certain horse breeds and other equine species produce characteristic offspring. The most common hybrid is the mule, a cross between a "jack" (male donkey) and a mare. A related hybrid, the hinny, is a cross between a stallion and a jenny (female donkey). Most other hybrids involve the zebra (see Zebroid). With
Poitou donkey de Poitou Society, organized by the American Donkey and Mule Society, is the American registry for the breed, coordinating with French officials for inspections and registrations of American-bred Poitou stock. Poitou donkey The Poitou donkey or Poitou ass (), also called the Poitevin donkey or simply the Poitou, is a breed of donkey originating in the Poitou region of France. It is one of the largest donkey breeds, and was selected for size so that it could be used for the production of large working mules, in conjunction with the Poitevin horse breed. It is known for its distinctive coat,