My Young Rooster and Young Hen have been together since i first got them and they are about 4 months old (Plus a week so it would be 4 months and 1 week old) But after a week of haveing them (I got them when they where 4 months old) The Rooster is suddenly playing or attacking my hen (Or pullet but i like to call her a young hen) he would jump around her with his feathers fluffed up and sometimes peck at my hen (But not really hard to make feathers come off) But the hen would peck back at him and make a feather or two fly off! I don't know if this is just a way for chickens or the rooster is getting violent ooor 'sexualy mature'. Please tell me what i can do.