I had staffs,...I worked them in the countryside proper,...I can honestly say I never had a dodgy one,
I kept a good few pits,where humans were concerned,never with any of them have I ever seen any sign of aggression,I might be wrong,and I probably am,but in wondering if it's a new problem,and when I say new,I mean going back 10-20 years...when they were not in the pet market and kept mostly for legitimate strong dog work,I can't recall hearing dog attacks from the bull terrier types...bird,what you reckon,did you ever have any issues with your staffs back in the day