The English Bulldog, listed by the AKC simply as the Bulldog, descends from the Old English Bulldog, a fierce dog used in bull-baiting until England outlawed the sport in 1835. Afterward the breed was reshaped into a companion, keeping the massive head, loose wrinkled skin and low, wide body but gaining a far gentler disposition.
Adults usually weigh 40 to 55 pounds and are calm, affectionate and good-humored, happiest with short walks and long naps near their people. The flat face is the trade-off: breathing trouble, poor heat tolerance, skin-fold infections and joint problems are common. In Rockville, that means planning around humid summer afternoons, keeping a Bulldog lean, and budgeting for a vet who knows flat-faced breeds.