they were years ago , but the apbt was bred for performance = work, the american staff, was for show stuff, regards pigs you be better of with dogs doing the job now, plenty of blokes use lines from proven dogs , and most are hybrids = x breeds , but as said there some leggy pits with good stamina and fast for what they are, i like pit in a lurcher = pit x grey etc, pit very good dog to put in any breed .