My guess is that they don't sweat as tribal says. Dog's don't have sweat glands hence they pant and shead a lot of hair. Sweat is for the full purpose of cooling and the fact that deer have a body full of hair there isn't the desired amount of evaporation to cool the body of the deer. The hair would retain too much. I will check with my hunting bud who is a prof at a school of vets and get back with you.