You may not realize it, but many of today's most popular dog breeds were actually bred hundreds, if not thousands, of years ago to be expert hunters. Their size, coat, color, behavior, and unique abilities were all carefully selected and engineered to assist in the hunting of game big and small, including deer, foxes, waterfowl, and even rats. Some were also bred to assist on the farm, working as shepherds. Though more often found walking on leash...