The earliest references to a Welsh pig come from the 1870’s when there was a considerable trade in Welsh and Shropshire pigs into Cheshire for fattening on milk by-products. “The Welsh pigs are generally a yellow-white, but some are spotted black and white. The (Cheshire) dairymen depend more on these Welshmen and proud Salopians than on breeding. The cross of the Manchester boar with the Shropshire and Welsh produces a larger and coarser breed than the small Yorkshire.”

The Wuzhishan breed is very quickly being forced out of existence. They are a local breed raised only in the province of Hainan, China. This area is a geographically isolated tropical mountainous region. Very few people in this region raise this breed for production purposes because of the fast introduction of exotic species. Special attention is needed in order to preserve this rare species. There are fewer than 30 Wuzhishan pigs remaining, with only 3 boars, and all are in ex situ conservation.