I am new to raising chickens, this is my first flock. We bought 8 chicks in May that were about 3-4 days old. We were told they would all be hens but we ended up with a rooster. He has been with all the hens since day 1 but recently is getting mean and aggressive with them. He chases them around, corners them and then pecks at them. They try and stay away from him for the most part. I'm not sure what to do about him. Would he be the reason none of our hens ( 4 months old) are laying eggs? Any advice?