My 5 hens are all the same age, 1 1/2 years old. It's been a very cold winter and the egg production has been way down. About 3 weeks ago, one of my hens decided to molt. She lost a tremendous amount of feathers in a short period of time. About a week later, I noticed some blood smears on the walls of the coop where the hens roost at night. It was then that I noticed Gigi's rear end looked quite scabby and that the other hens tried to peck at her backside any time she ventured too close. The wounds seem to be healing and the feathers are finally growing back, but Gigi continues to be bullied by the other hens. She's now totally freaked out by the others and spends her time running from them and/or hiding from them. I've thought about isolating her until she's completely over her molting but then fear that when I try to re-introduce her back into the pen she'll be rejected. Should I isolate the biggest bully instead? If so, how do I do that and at what point do I re-introduce her back to the flock?