* Horns are made of keratin, the same material as human hair and nails. They are not bone or teeth.
* Rhinos use their horns for defense, mainly against predators, and sometimes for digging in the ground.
* Rhinos have strong, tough lips and teeth that they use for grazing on vegetation. They have a prehensile upper lip that helps them pull leaves and branches into their mouths.
So, while a rhino's horn may be useful for many things, eating is not one of them!