My chickens are about 4 months old (I have 6). My Buff Orp hen (she is #1 or #2 in the pecking order) has a bit of an attitude with me. She often comes toward my legs as if she is going to peck at me. This evening, I went to close them in their coop for the night and she came running out and sort of charged at me. She is very sweet with my son but acts very haughty around me. What's up?