Pigs enjoy relatively clean pens at the Little Donkey Farm, which claims to use no chemicals of any kind to raise or treat the pigs. Clenbuterol, known in China simply as "lean meat powder," is a dangerous drug that's banned in China's food supply. (Associated Press)

Pigs enjoy relatively clean pens at the Little Donkey Farm, which claims to use no chemicals of any kind to raise or treat the pigs. Clenbuterol, known in China simply as "lean meat powder," is a dangerous drug that's banned in China's food supply. (Associated Press)