Hello. I was thinking Trama also. Hens will try breeding each other too. Last summer I got in a young Drake that could not extend his neck either. I put him in a Plastic tub of warm water and masseaged and extended his neck. In about 4 days he was feeling better. I kept him separate in a hospital pen till he felt better. He now lives at his forever home.
Hope everything goes well with your Duck..
Hope everything goes well with your Duck..