>>10998505Pit bulls were bred in Britain for fighting. They're part bulldog, part terrier.
>>10998526I train labs for hunting, several dogs in the kennel right now are littermates or half-siblings. When they're being fed, trained, moved, or left alone to relax, they are kept in separate cages. They get to play with each other and take a shit three times a day, 10-20 minutes at a time, supervised. They're all well-behaved but a fight can escalate very quickly and a single serious bite can disfigure, maim, or kill. So they don't get to fuck around without someone watching.