all boys will get along just fine, throw 1 girl into the mix and you got fighting. just like with people. little boys get along great, once they hit puberty they all start fightng over girlfriends.
I also know of 2 people who raise all drake pekins for the meat market, they order 100 at a shot
yup, an all boy flock work just fine. My neighbor has a lonely mallard drake and I keep trying to give her one of my extra drakes but she insists that she needs to get him a mallard mate