So one of my hens has not been herself the last few days. All she does is sit in her box and has become very aggressive if you get near her. Shes been laying eggs for about a month now and I can't tell if she is sitting on any now and I'm not about to get bit trying to find out. I don't have any roosters so she's going to be sitting there a long time if she thinks shes going to have chicks. I don't know what I should do.