My specialty is chickens, not ducks. So when a family friend finds a 2-3 day old duckling trying to cross the highway, she takes it to me. I love Gertrude, but I don't know much about her. Her wings are odd, and I'm getting worried. Is is Angel wing? My feed bag says to feed her this food for 18 weeks... It's Purina Flock Raiser, and I would feel HORRIBLE if my feed store told me wrong. They said it would be okay... She is five to six weeks old. If you can Identify her, that would be awesome!!!