Doro eggs have giant ears that allow them to listen to their surroundings and for approaching danger. It is not understood how and why they have evolved to have this trait, as they have no ability to actually move themselves out of danger. Some scientists in Ark City have suggested that the egg's mother may have a psychic connection and make come running to protect her egg from that which might want to destroy it.
Doro bears are the most huggable and friendly bears in all of Ark. They are great companions to humans, eat a vegetarian diet, and are non-aggressive in almost all ways (unless threatened by other larger bears that are not their own species). Many Doro owners argue with Arkians who own dogs and say that the Doro is man's "actual and true best friend."