On Mount Yaji in southern China, they are checking in the sows a thousand head per floor in high-rise "hog hotels."
Privately owned agricultural company Guangxi Yangxiang Co. Ltd is running two seven-floor sow breeding operations, and is putting up four more, including one with as many as 13 floors that will be the world's tallest building of its kind.
Hog farms of two or three floors have been tried in Europe. Some are still operating, others have been abandoned, but few new ones have been built in recent years, because of management difficulties and public resistance to large, intensive farms.