For the last two weeks, I've noticed that our most submissive hen, Clementine, was starting to look fluffy like she was losing her feathers on the end of her back, just in front of her tail. We got a chance to look underneath the fluff, and discovered some sore spots (see pics) and definitely a lack of plumage there. One other hen dominates her and I've seen her peck Clementine in that exact spot. Clementine looks very healthy everywhere else, as does the rest of the flock (6 hens, all hatched in May 2017). They are also laying more eggs than ever, collectively, so I don't think any of them are moulting. However, I'm just starting to see our most dominant hen, Cricket, with a cluster of broken feathers in that same spot as Clementine (no wounds at all for Cricket). QUESTION: Or is there something else I should be considering?? What would you do if you were me? Thank you for your help!!