I have a 28 week old cockerel, haven't had any troubles, he's actually quite gentle when it comes to the hen mating business. Until just this weekend he had 5 hens, he now has 13. However in the last couple days, he's started rushing and grabbing the fence when my wife is standing there and recently my 5 year old grand daughter as well. Is he showing aggression or trying to mate? If this is aggression, what can be done to stop it? He does nothing of the sort when I am near, nothing. He now has my wife scared and worried. Any advice???