Diet

A giant panda's appetite for bamboo is insatiable. They eat bamboo 12 hours a day. That adds up to 28 lbs. of bamboo each day, according to National Geographic. But one reason they eat so much is that bamboo is low in nutrients, according to the San Diego Zoo. Giant pandas also eat rodents, fish, insects and birds. Eating both vegetation and meat makes these pandas omnivores.

The giant panda's stomach is ideal for digesting bamboo. The walls of the stomach are extra-muscular to digest the wood of the bamboo. The stomach is also covered inside with mucus that prevents it from being punctured by splinters.

Resource: https://www.livescience.com/27335-giant-pandas.html