Some females won't go broody till their 9 months but I find when the males are younger they have slimmer longer bodies compared to females of the same age if u could post more pics that would help
my white female I actually recused in a ditch next to our house it was there for three days before I relized a couple of stray dogs were in the neighborhood
I never let mine out. It seems that when any bird of mine gets out something happens. Like a hawk or a dog gets them. Which is also why I clip one wing on my muscovies to limit their flying.