Giant panda to digest cellulose is ascribed to the microbes in its gut. Pandas are born with sterile intestines and require bacteria obtained from their mother's feces to digest vegetation. The giant panda is a "highly specialized" animal with "unique adaptations", and has lived in bamboo forests for millions of years. The average giant panda eats as much as 9 to 14 kg (20 to 30 lb) of bamboo shoots a day to compensate for the limited energy content of its diet. Ingestion of such a large quantity of material is possible because of the rapid passage of large amounts of indigestible
Su Lin (giant panda, born 2005) and was weaned in early 2007. Su Lin and her sister Zhen Zhen were sent to Bifengxia Panda Base in China on September 24, 2010. In March 2011, Su Lin successfully bred with a male giant panda. Shortly after, she was transferred to Hetaoping, where she delivered her first cubs, a male, and a stillborn cub on July 7 in a semi-wild environment. Later she and her cub were returned to Bifengxia, where they lived in a semi-wild situation at an area named New Leopard Mountain. Su Lin's son is named Yun Hui; he currently lives with two females who