One of my hens showed up with a broken wing when she was a few months old. The drumette part of the wing was broke at an angle and through the skin. I squirted some betadine liquid on it, put a large non stick gauze pad (folded in half) under the wing to keep the wing from direct contact with the body, then used vet wrap to wrapping the broken wing to the body, wrapped under the good wing so the vet wrap would stick to itself. I changed the bandage daily for the first three days, reapplying the betadine, then every other day after that. If I remember correctly, it took about a week for her to hold her wing up like she was supposed to. We held her a lot, as she couldn't move well being wrapped up, and we kept her and her sister(for chicken emotional support) in a dog crate, her sister helped her a lot. I would let her move around a bit every time I took the bandage off, and took my cues from her and her sister. The last time I took the bandage off, she stretched her wings and tried to flap a bit, and her sister acted like her physical therapist, she kept pouncing on her to get her to flap her wings( not the I'm the top of the pecking order aggressive pounces ). She is the top of the pecking order, and flies better than the others.
I am not sure how you would do that with the wounds on the back, but I guess you could put the non stick gauze pads over those wounds where the vet wrap would go so it won't stick.
