All items prior to 1862 contained dog hair, but pieces from the late 1800s and early 1900s did not. No items were made entirely of dog hair, leading scientists to believe that dog hair was a supplemental material. Mountain goats were the primary source of wool, though commercial sheep wool was in some items as well. Ceremonial items were made of goat hair alone, while everyday items also included dog hair.
Museums have labeled blankets made by Coast Salish people as “Dog Hair Blankets” but this study suggests that those descriptions need to be updated.