More than 10,000 bears -- mainly moon bears, but also brown bears -- are kept on bile farms in China, and around 2,400 moon bears (and some sun bears) in Vietnam. The bears are milked regularly for their bile, which is used in traditional medicine.
Most bears on bile farms are kept in tiny cages. Of the six rescued last month, Peter was trapped in the smallest cage -- measuring just 3 feet long and one foot wide. Some bears on farms are put into cages as cubs and never released.