I have a 3 year old Australorp black star mixed hen who is bulling one of our 1 year old hens. She picks on other hens as well, but really has a dislike for this poor girl. To the point, the hen being bullied only seems peaceful when free ranging(now we can't even do that with the increased numberof hawks), but even then she gets picked on. She is super skittish even more then she was. You can tell she isn't eating as much as the others either.To make it worse, the rooster is over mating her (second saddle he tore through). Not sure what to do with the mean hen. We have 17 hens and one rooster. They coop is a 10x16 shed and the run is 10x20.