I have 3 Cayugas purchased at the local farm store. They had 6 and I took 3. Ended up with 2 drakes and a duck (I think). From what I've been reading, I should let them produce any babies, correct? I added a second crested Cayuga, from a separate breeder, sex undetermined at this time which I'm hoping will be a duck. Should there be a mishap and the brother/sisters try hatching egss, what happens? They just don't hatch or what? Does this also mean that I need to have separate pens for all of them to pair up? What about a Cayuga drake and Blue Swedish duck? Cute babies or disaster?