one of my girls has been steadily losing her feathers over the past 2 weeks. we are not sure why she has been losing her feathers; we watched her with her 12 other sisters/aunts, and she is the only one in that condition - she also seems to be the only one the older girls torment (and she's not really a timid girl). after catching her and inspecting her we found she has many broken feathers and skin exposed, so yesterday we removed her from the flock and have her quarantined in the garage in a large dog crate with bedding and a small heat source (it's 8 degrees here!). any ideas of what could be wrong and how we might help her? her feed is formulated for pullet/layer diets, so i don't think it's necessarily a nutrition issue. any help/advise would be appreciated.