http://www.sciencemag.org/news/2019/11/dog-bones-could-help-patch-broken-bird-wings

Researchers helped pigeons with broken wings fly again using surgical pins made of sheep and dog bone.

A broken wing can be deadly for a bird, not to mention heartbreaking for the person who finds the creature flopping on the ground. Now, researchers have developed a new treatment for injured birds using a surprising material: the bones of sheep and dogs.