I think my duck might have Angel Wing. He is still fairly young, and has not grown all his adult feathers yet but today i noticed that his left wing tip seems to be pointing away from his body!!!!!!!!! Ill take a pic in the morning and post it for review. He was fed Purina Start and Grow for the first 3 weeks until I ran out and could not find any locally that was unmedicated so I had to switch him to flock raiser. Is there anyway to reverse this problem?