I have a girl who has been broody for a couple of weeks now. When she comes off the nest its crazy out in the yard. Several other hens (some pullets) start attacking her and she fights with them. We're talking spurring and full out fighting. The girls have never had an issue with her before this. Even the rooster seems to not like her any more. He's not attacking her but if she comes around he snips at her. What is going on?