My one Pekin duck that I was hoping would be female is looking more like a drake at 14 weeks. 'Norma" has a new curled tail feather. My question is can I introduce a female duck to Norma (have to change that to Norman, I guess) without problems? I also have 8 chickens, 7 hens and one rooster as well all 14 weeks old. They all reside in the same coop.