https://www.wired.com/2013/04/animal-superpowers/

Spotted hyena (Crocuta crocuta) Hyenas can eat pretty much anything. Their powerful jaws can crush bone, and they can consume up to a third of their body weight in meat in a single meal. Fresh kills, rotting corpses -- it's all good. They've even been known to consume anthrax-ridden cattle carcasses without ill effects. But even this super stomach has its kryptonite: Hyenas can't digest hair, hooves, and horns. Those bits get barfed up in pellets. Image: lydurs/Flickr