The Alapaha Blue Blood Bulldog is a breed of bulldog from the United States, and it is predominantly used as a guard dog. It is a very powerful, muscular breed with large head and brachycephalic muzzle. The hair coat is short, typically colored white with black, blue, buff or brown patches, and its tail is kept un-docked. Sexual dimorphism is common in the breed, with larger dogs typically twice the weight of smaller bitches.