In the 17th and 18th century, the Old English Bulldog had many different strains for cattle-droving, bull-baiting, farm dogs, and butcher's dogs.Bull-baiting was also a common blood sport of the era and though there is evidence of such migrating to America with the landrace bulldogs brought by working class Englishmen in colonial times, it is also certain that the strains that migrated to America were unaffected by the banning of the sport in 1835 in the U.K. and, therefore, there was no need for a decline in the population of the old-type bulldog. At another point, Johnson began crossing his original lines with an atavistic English bulldog from the North that had maintained its genetic athletic vigor, creating the Bully type American Bulldog, also known as the Johnson type or the Classic type. The American Bulldog is a stocky, well built, strong-looking dog, with a large head and a muscular build. Eye color is usually brown, but heterochromia also occurs, although this is also considered a cosmetic fault.
[{"common_diseases": "n/a", "affects_eyes": "n/a", "caused_by_genetics": "n/a"}]
[{"common_diseases": "n/a", "affects_eyes": "n/a", "caused_by_genetics": "n/a"}]