If you ever wondered why your dog likes to roll in dead fish, deer poop, and the occasional wad of used bubble gum, The behavior is called scent rolling.
According to Pat Goodmann, a research associate and curator of Wolf Park in Indiana the wolves at their semi-natural wolf reserve also scent roll. When wolves encounter a novel smell they may be using scent rolling as a way to bring information back to the pack. When wolves return to the pack, the other members greet it and during the greeting investigates the scent thoroughly. To a wolf scent is information and scent rolling is part of the way wolves carry the news.
Study abstract: Click Here