I’m new to the chicken and duck thing. But I dove right in and bought 10 pullets and 2 ducks. Dolly, my beautiful hen turned out to be Donny, Donny the rooster. They’re all the same age, born the end of February of 2022. Donny is now crowing and mounting Daffy the duck at every opportunity. Hei Hei the other duck tries to intervene. Sometimes successfully. And yes, they an 11x 36 run and large coop.