My 10-11 week old rooster and the rest of his girls are the same age. well at night he gets a little aggressive and when one of my girls's come out of the pen and I open the door for her to go back in my rooster will jump form the roost and come out cause he likes to always come out of the coop but then hell grab her neck feathers and she doesn't like it. So I yell at him and he starts jumping side to side at me but he back down cause I yell and point my finger at him. But this only happens at night and tonight he did it the youngest, my little silkie, and I definitely yelled at him. Then she perched on my arm and he couldn't reach her. But is this just because there not on the roost? Should I be concerned about this behavior? He also does the same thing when I try to pick up one of the girls. I guess he doesn't like it. Any ideas?