I recently obtained a large male Muscovy drake- I don't know his age, but he is HUGE. I have a proven Muscovy Hen Brooder (she is a wonderful mom, and has bred very successfully with my very randy Black Swedes in the past.) We decided to go all in with Muscovies, and have removed the male Black Swedes, which are making tasty dinners now. We have a couple of sterile "Mullards" which will be butchered soon, leaving just the pair of Muscovys. I have not seen him show any interest in the hens. Is he too young? Low libido? Missing his other friends?