FWIW- wouldn't you want to hold back a male or two at times that you want to put with a certain female/females?

I'm green here myself and just looking at my first breeding season this fall. I'm hoping my 1.1 Pied pair take a liking to each other, or I'll be hunting for another male. I've just heard that certain couples will not always pair up and that would kill your female holdbacks if you were stuck with a male that needed some Viagra or your female didn't take a liking to.