Hypotheses: not theories. I rely more on observations and facts: "When a wolf encounters a novel odor, it first sniffs and then rolls in it, getting the scent on its body, especially around the face and neck. Upon its return, the pack greets it and during the greeting investigates the scent thoroughly. At Wolf Park, we've observed several instances where one or more pack members has then followed the scent directly back to its origin." These observations do not support the "pack smell" hypothesis. Brown Bears have also been observed scent-rolling: rolling in pepper spray residue. Brown Bears are not pack animals, nor do they hunt in stealth, but Polar Bears do hunt seals in stealth. So I wonder if Polar Bears scent roll.