Why is hyena able to eat a broken bottle without getting hurt ? ?

Hyenas have a unique adaptation in their digestive system that allows them to consume and process a wide variety of food, including bones, hooves, and even broken glass or metal. Their stomachs produce highly acidic digestive juices that can break down tough materials like bones and glass. Additionally, their intestines have a thick lining that helps protect them from sharp objects. This combination of strong stomach acid and a specialized digestive system enables hyenas to eat and digest items that would be harmful or even fatal to other animals.