Di’s family of outcasts include arthritic sheep and partially sighted pigs. | BBC Three

At the end of October in Bengbu, east China's Anhui Province, about 100,000 mu (6,667 hectares) of alfalfa await the last harvest this year. Known as the king of pastures, alfalfa is rich in nutrients and best for feeding animals. Some five kilometers away, sits Modern Farming's Bengbu Farm. It is a huge modern ranch and the largest raw milk producer in China. Nearly 600 acres, the farm has eight lactating cow barns to hold 2,880 milking cows each. The freshly harvested alfalfa will be delivered