I have a Japanese Bantam that has always been well behaved with me and his girls, but I've recently added a new hen and he pecks at her neck and back repeatedly when they go in to roost at night. All the other hens pick on her too. I realize they are trying to establish a pecking order, but I don't understand why the rooster pecks on her so bad when they roost. She tries her best to hide under his wing, but all he does is pecks at her (hard). What is going on with him?