My Sheldon has gone broody all of a sudden. She snarls at the other girls, she sits in the egg box all day and if I go in to check on her she screams at me. She wont eat or leave the box so I think its broody behavior. I tried to lift her to see if she was laying on eggs and she bit me. There is no rooster so why would she be sitting on her eggs like that? They aren't going to hatch.