I have a 15 week old BO rooster. My daughter gave him and a hen to me when they were 8 weeks. At the time I got the 'bigs', I had 15 'littles' (all hens) that were 4 weeks. I kept them in a pen that I divided with chicken wire. At 12 and 8 weeks (respectively), I took out the fence and let them all run together and let them outside. Both the 'bigs' were a little hard on the 'littles' for a couple days and then things settled down. However, the roo is still being aggressive at times. Especially eating - he will grab and hold on for a second or two. Or when they are inside (like settling in for the night) he will charge them if they get too close. The 'big' hen very rarely does anything to the 'littles'. The roo is very good with the older hen. He does not feed her or take care of her yet, but never hurts her. Is this normal for the roo? Will this aggressiveness pass when he matures? thanks!