This weekâs mutt came to Underdog Animal Rescue and Rehab with four puppies and an awful smell. When Pearl first arrived, she needed a deep bathâthis lady had definitely rolled in something smelly. There are many theories about why dogs roll in things. One theory is that rolling in many scents creates a scent map that tells other dogs where their canine buddy has been. Another study showed that dogs prefer to roll in the scat of their own predators, which might help protect them from being hunted. Regardless of why dogs do it, it's natural and many of our dogs get their first bath at Underdog to get rid of the smelliest of smells.