Sexing 9 weeks old Muscovy?

[GhettoRoo]

Is there any ways to do that?
I had only one offspring of mine pair.
Looks like colouring is from father, black and white, while mother is brown.
Father from young age try to bully him.
Now in this age, today, they live seperated, but father run after him and climb on it, like trying to mate I guess. Can it mean duck is is a girl? Or I dunno.......

 

[Buck Oakes]

you should be able to tell at that age, mainly by their personality many qualified muscovy owners can tell within the first 2 weeks