Has anyone used anything other than wood to make nest boxes? Not for wild flocks, but for my own aviary. Also. For Mandarins, I have 1 white boy, 1 split white boy, and 1 regular colored boy. 3 white girls and 1 normal girl. The all white boy and 1 of the white girls are this years hatch. And the others are from 2013. If I leave them all together, what are my chances of the young white male breeding with one of the others? Or will the older boys keep him away from the girls? I can split them up if need be.