I think the natives here must be animal worshipers. In other, more primitive cultures, animal worship is often expressed by the wearing of animal skins and performing ritual acts as the animals in question. Not only do these beings wear animal skins, but with their advanced (yet medieval) technology, they actually perform sugery on themselves in order to emulate the features of some of their most revered gods. For example, the teeth of a horse, the beak of a bird, and the mammaries of a gurnsey cow. Fascinating.
