http://www.slate.com/articles/video/video/2015/10/bamboo_bread_is_the_san_diego_zoo_s_treat_for_their_panda_gao_gao_video.html

Pandas eat a diet mostly of bamboo, but it’s a rather abrasive plant. As an aging 25 year old, the San Diego Zoo’s panda Gao Gao (pronounced like cow cow with a g) has a mouthful of worn teeth. To help him out, zoo nutritionists came up with their own recipe for a tasty panda bread that would be easier for him to eat—and easier for them to feed to him.