Sanctuary Fighting back the darkness with style.

Many magical traditions include tales of people using the skins of animals to become or gain an attribute of that animal. Perhaps the most well known is the Navaho yee naaldlooshii (literally "with it, he goes on all fours" in the Navajo language). A Navaho Skinwalker is a person who follows the Witchery Way, which is a perversion of the Blessing Way, used to curse rather than heal. A Skinwalker can turn into any animal if he or she dresses in the skin of that animal, but coyotes, bears, and ravens are the most common.
Other animals can see through the disguise of the Skinwalker, but humans may not know the difference. It is said that a Skinwalker cannot make a perfect copy of an animal, however, and may leave clues such as paw prints that are out of proportion, or slightly misshapen legs - something that an observer must be looking closely for to notice.
Legend has it that if a person could find out the idenity of a skinwalker, then say to the skinwalker "(name) you are a skinwalker", the skinwalker will die on the spot. Other protections against skinwalkers include pollen, rubbing oneself with cedar ash, and carrying juniper berries.