I have 3 magpie ducks, 2 are hens and 1 is a drake. The goal was to breed them, but I’ve ran into a problem as they are over 6 months old and I still haven’t gotten a single egg out of them and I can’t figure it out. They are fed layer pellets, have clean water, fresh straw bedding, and have plenty of outdoor time. And not a single egg has been laid. What should I do?