Small White pig Small White pig The Small White or Small Yorkshire was a breed of domestic pig originating in the United Kingdom and which was common during the nineteenth century. It is now extinct, but its characteristics were used in producing the Middle White and other breeds. The Small White was developed in the early nineteenth century by cross-breeding the traditional Old Yorkshire, a large white pig, with imported Chinese pigs. This created a small animal with a pure white ground colour, pricked ears, the short, wide head of the Chinese breeds and their characteristic short upturned snout. In common with the
Breed registry animal's "papers". Registration papers may consist of a simple certificate or a listing of ancestors in the animal's background, sometimes with a chart showing the lineage. There are breed registries and breed clubs for several species of animal, such as dogs, horses, cows and cats. The US "Association of Zoos and Aquariums" (AZA) also maintains stud books for captive species on display ranging from aardvarks to zebras. Kennel clubs always maintain registries, either directly or through affiliated dog breed clubs. Some multi-breed clubs also maintain registries, as do non-affiliated breed clubs, and there are a few registries that are maintained