I always put my young roo's through my roo camp. As soon as I have established they are roo's I grab them up usually in the coop at dusk hold them upside down by thier legs for a few seconds until they relax then smash them on the ground and put my fingers and hold down thier heads too. All of this is in front of the flock. I am keeping one Black Maran roo who is just 13 weeks old right now but we shall see how he matures, right now he runs from me like I am the devil and I like it that way. I have no desire to be his friend, he needs to respect me as the real flock leader.