Smithsonian's National Zoo is caring for an unprecedented four giant pandas at once: adults Mei Xiang and Tian Tian, juvenile Bao Bao, and little Bei Bei. The panda boom is a blessing and a good sign the program between the Chinese and U.S. governments to conserve this critically endangered species is working. But more pandas means tons of work for their caretakers, who are committed to keeping them fed, rested, and mentally stimulated. Follow them as they share the secrets to keeping their diverse group of charismatic pandas happy and healthy.