I do not have research information on this timeline. Would it be possible to post a link on this?
Pits were bred for one purpose, and when they realized they went too far, they tried to bred out the ‘human Biting trait” Given the lopsided ampount of damage these dogs cause... Looks like they weren’t too successful... From https://badrap.org/breed-info/breed-history A dog (Olde English Bulldog) that looked much like today’s American Bulldog was originally used in the 1800’s in the British Isles to ‘bait’ bulls. These matches were held for the entertainment of the struggling classes; a source of relief from the tedium of hardship. In 1835 bull baiting was deemed inhumane and became illegal, and dog fighting became a popular replacement. Soon, a new bulldog was created by crossing the Olde English Bulldog with terriers to create smaller, more agile dogs. The best fighters were celebrated and held up as heroes for their courage and fortitude during battle. At the same time, bite inhibition towards humans was encouraged through selective breeding so gamblers could handle their dogs during staged fights.