American Bulldog

Origin:
The American Bulldog is perhaps the most faithful strain to the English Bulldog as it was imported to America before the English Bulldog was crossed with the Pug during the Industrial Revolution. American Bulldogs are generally divided into two strains: the Classic American Bulldog, also known as the ‘Johnson’ (after its breeder) or ‘Bully’, and the Standard American Bulldog, also known as the Scott (after its breeder) or ‘Performance’.
Size:
The American Bulldog is a bit faster and substantially larger than the French or English Bulldog at 50-71 cm (20 to 28 in) and 27-54 kg (60-120 lbs). The Johnson American Bulldog is the larger of the two strains. The American Bulldog’s face resembles a Pit Bull, but the muzzle is boxier and it typically has uncropped ears and a bulkier head. The American Bulldog is built strong and agile, with a large chest and legs, low-set tail, and stocky frame.
Character:
The American Bulldog is powerful, confident, and agile. It is naturally alert, inquisitive and fearless. It has often been called heroic, and when deployed against an intruder it is nearly unstoppable. The American Bulldog is a highly obedient and confident breed
Temperament:
The American Bulldog is affectionate toward children if properly trained and socialized. It can be somewhat standoffish or aggressive around strangers. Because they were originally bred to bring down bulls and other livestock, American Bulldogs have a strong aggressive instinct with other animals. They should be properly socialized when young.