It is believed that the bulldog's origin stems from England and Europe. These dogs were developed for the purpose of bull-baiting. This practice began as a necessity of farmers and butchers, who needed to keep angry bulls under control. However, bull-baiting quickly developed into a spectator sport and was eventually outlawed by English parliament.
They are a Molosser breed with ancestors dating back to the Tibetan Mastiff. Farmers would cross Mastiffs and bulldog types to create their "Gladiator dogs". These "Gladiator dogs" were considered the prize fighters of their times. Dogs that stem from this line are the American Pitbull Terrier, the Staffordshire Terrier, the Bull Terrier, and American Bulldogs to name a few.
The ancestors of the American Bulldogs were brought to the Americas by settlers in the late 1700s. They were used as farm utility dogs to protect the family farm, control livestock, and to hunt wild boar. These dogs are different from the English Bulldog that we know today. Opposed to the English bulldog, they are a functional working breed that do not carry the miriad of health problems.
The American Bulldog we know today is considered the "original" bulldog, from which the English bred in the sour mug trait to create the English. Bulldog. The "original bulldog" survived in the southern region of the United States as the premier working breed. This priceless breed was almost extinct until breed preservationists such as Alan Scott, Darrin Jones, and John D. Johnson made it their goal to preserve and promote this wonderful breed.