She will most likely lose that feather pattern on her chest and get more solid. They change alot in feather coloring.
If she is a mix its hard to say. I once had a muscovy/rouen mix that looked a lot like a rouen (neck ring, coloring) but had a number of muscovy traits too. He feathered out like a rouen though.
If she is a mix its hard to say. I once had a muscovy/rouen mix that looked a lot like a rouen (neck ring, coloring) but had a number of muscovy traits too. He feathered out like a rouen though.