I have also have a roo that is starting to reach maturity. I have raised him from the time he was a day old. He "flogged" the back of my leg one day, and I hit him on the tail feathers with a plastic muck fork. He was fine for a couple weeks, and then the other day he did it again, only from the front. I put my foot up to stop him, so he ran into that with his chest. But then he did it again! So I chased him around a little. They seem some what half-hearted attempts (like he doesn't really know what he is doing). Today I was in there on a mission and didn't give him a chance before I kind of chased him around, and flapped my arms like some people have said (instead of physically hitting him). He always runs away, but he crows, and then I just get the feeling that he is giving me "the look". I also picked up one of the hens in front of him.
We have a small flock, and its making me very sad to have to even worry about him, and think that he may only get worse. My question is do Roosters go through an adolescence and then come out the other side a little calmer? Or if they are displaying aggressiveness it will only get worse? "Vlad" never acts up around my boyfriend. My boyfriend, though, is able to pick him up, and he is just too big for me to do that. Although I might be trying it for better or worse!