Learn how veterinarians in China try to save pandas from extinction. When giant pandas have twins, the mother only has enough milk for one of the babies. In the wild, she will chose one to look after and leave the other to die. Veterinarians at the Ya'an Bifengxia Giant Panda Base can keep the rejected cub alive with advanced neonatal care. But the babies also need antibodies found in their mother's milk, so the team attempts to swap the twins. Although pandas have a very keen sense of smell, the mother accepts the rejected twin and feeds it. The twins are swapped betwen their mother and the nursery every week until they're six months old.