One of my smaller hens has the top of her wing picked raw. I thought the other hens were doing this, but last night i separated her, & this morning it's twice as bad. So she must be doing this to herself. I put stop pick on last night & again this morning. They are all losing some feathers, so I guess they are starting to molt. Should I bandage this? The injury is were all the wing feathers join & all the tops are exposed. I guess it is itchy, I don't know. Please any suggestions.