The Bulldog is a medium-sized breed of dog commonly referred to as the English Bulldog or British Bulldog. Other Bulldog breeds include the American Bulldog, Old English Bulldog (now extinct), Olde English Bulldogge, and the French Bulldog. The Bulldog is a muscular, heavy dog with a wrinkled face and a distinctive pushed-in nose. The American Kennel Club (AKC), The Kennel Club (UK), and the United Kennel Club (UKC) oversee breeding standards. Bulldogs are the 5th most popular purebreed in the United States in 2013 according to the American Kennel Club.