I am new to having chickens and I am not sure what to do. I thought we had 8 hens well not to be so my problem is that the 1 rooster he is now 5 months old and becoming very aggressive towards the hens. The one he is really picking on my favorite Sara Jane he is pecking her so much she is bleeding from the back if her neck. I don't know what to do I know what I would like to do the problem is the rooster is my 7 year old granddaughters. Will he become more aggressive the older he gets?