Our rooster is just over 6 months, and has been part of our flock for bout 2 months now. This past week he has started trying to walk on my hens, or walking over their back half. I have only had hens before--I didn't want to deal with a rooster, but my daughter talked me into it for FFA. Also this past week he has seemed to get somewhat possessive with my girls, he doesn't like us coming into the coop with them-one in particular. Is this normal rooster behavior or do I need to worry about him starting to get aggressive?