Dogs have been a part of human history for tens of thousands of years, when they were first understood to have been domesticated. People have been proud of their pups for centuries, and in fact, the second-oldest continuous sporting event in the U.S. is not baseball or football, it's the Westminster Kennel Club Dog Show, which just crowned bloodhound Trumpet as Best in Show. You know your canine companion is an important part of your life, bringing love, joy, and companionship, but how much do you really know about man's best friend? These 31 facts may surprise you.
Related: 20 Gifts for Dog-Obsessed Humans