Not certain what happened with the wing, but I would check her crop at night to make sure she is getting enough to eat. It may be necessary to add more feed and water stations.
I'll double check it tonight. I think she's gained since I adopted her, but I'll have to weigh her to be certain. I've seen her eating, and when I take down treats, spread them out so she can definitely get some. (Chia seeds and strawberries have been a hit so far. Then they all yell at me since I give them such a small amount of treats.)
Just checked her crop, we have maybe an hour before dark. It's full, and feels like the other hens crops. Kinda squishy, not hard or lumpy or anything.