We have 14 hens...1 Barred Rock, 2 Buff Orpingtons, 1 Cuckoo Maran, and 10 EE's. Three of our EE's are younger, but the older "girls" have decided to continually pick at one of the younger ones. She has no feathers under her beak, and is missing several on her neck and upper shoulders where they grab and pull. I need advice on how to get her feathered back out and possibly how to stop the others. They free-range our acre back yard but we do have a smaller mobile tractor like coup. We just have not wanted to separate them especially when it has been so hot. Any advice out there?? Thanks in advance.