Cheese in the categorization of these cheeses is their age. Fresh cheeses without additional preservatives can spoil in a matter of days. Content (double cream, goat, ewe and water buffalo) Some cheeses are categorized by the source of the milk used to produce them or by the added fat content of the milk from which they are produced. While most of the world's commercially available cheese is made from cows' milk, many parts of the world also produce cheese from goats and sheep. Some cheeses are described by their fat content. Double cream cheeses are soft cheeses of cows' milk enriched
Cheese hard cheese made from either cow or yak milk known as chhurpi. The national dish of Bhutan, ema datshi, is made from homemade yak or mare milk cheese and hot peppers. In Yunnan, China, several ethnic minority groups produce Rushan and Rubing from cow's milk. Cheese consumption may be increasing in China, with annual sales doubling from 1996 to 2003 (to a still small 30 million U.S. dollars a year). Certain kinds of Chinese preserved bean curd are sometimes misleadingly referred to in English as "Chinese cheese" because of their texture and strong flavor. Strict followers of the dietary laws