I purchased some rouen duckings in March 25th ( a few days old) and they looked exactly the same. The older swedish drake I have I thought has has had his way with 1 one them, the other he cant catch..... but here is my question......In the last 2 weeks I noticed the larger of the 2 has gotten gray feathers on the lower half and a green head....if I am not wrong does this not indicate a drake? I am really confused because the one I thought was a female was because the swedish has had his way with him/her? I also checked for a white ring and there is a small one around the neck....if this is a drake what was that other drake doing to my poor little boy/girl ????