I'd like to point out that every Native American tribe had different, even if only slightly different, beliefs. The Tlingit people did not follow this practice as it was seen to be disrespectful to the dead. They did wear animal hides, but they thanked the spirit/soul of the animal and apologized if they had killed the animal. They also used every other part of the animal believing that not using it would be even more disrespectful since that is why they killed the animal in the first place.
As a request, not a demand, if you know the name of the tribe that followed certain beliefs that you share it is appreciated by members of other tribes, such as myself, if you name that individual or group of tribes rather then say 'Native Americans' since saying 'Native Americans' gives the impression that all tribes followed that belief.