Yep, find your culprit, that's a very common pecking spot, even more so for young chicks but also for adults. Looks like someone is pulling out her pin feathers before they can get a good start on life.
You will sometimes find that a hen is doing this to herself while preening. In this case, it is usually a protein deficiency or nervousness. Solutions are: higher protein feed (meat, oats, game bird feed or nonmedicated chick starter, etc), more room to run around and scratch (grass, plants, or deep litter helps), more entertainment to distract the flock during the day (seed block, hanging cabbage, etc.).
Good luck and let us know what you decide!
You will sometimes find that a hen is doing this to herself while preening. In this case, it is usually a protein deficiency or nervousness. Solutions are: higher protein feed (meat, oats, game bird feed or nonmedicated chick starter, etc), more room to run around and scratch (grass, plants, or deep litter helps), more entertainment to distract the flock during the day (seed block, hanging cabbage, etc.).
Good luck and let us know what you decide!