I need some help/advice. My presumably male blue Swedish duck was attacked by one of my geese. He is missing most of his feathers between his wings and was walking fine until 2 days ago; now he is using his wings to walk. For the last two nights I have kept him in a pen on my porch before placing him in an enclosure outside for the day. I am trying to give him time to rest away from the other birds while still allowing him to see his flock. He doesn't seem to be getting better and I am worried that I am not doing all I can. He is able to move his tail feathers and his feet and legs appear to be fine. Any advice would be welcome.