So I think I've read that any duck that came from the mallard can produce fertile eggs, even when crossed, right? So a Rouen mixed with a Swedish can produce fertile babies? Or a Rouen X Magpie or a Rouen X cayuga? Because I really want a male rouen, they are beautiful, and if he'd have babies with another breed I just wanna know if they'd be fertile. I'm just doing some research for down the road. Double checking what I've read Also, completely different question: is cayuga pronounced (K-OO-GAH) ??