Kathy, the same thing happened to me!Five years ago I started off with black/white pieds and from them I got my first chocolates, which were all female. Then this year I noticed some of the chocolates ducklings were male, so I'm not sure the sex link "thing" works the same way as it does in chickens. Maybe someone could explain it to me?
-Kathy
I started out with 3 black pied muscovy, 1 drake and 2 hens.
From them I hatched lavenders, silvers, whites with caps (black or chocolate), chocolate, and blacks.
Every single chocolate and chocolate capped ended up being females. I didn't get a single male from them that was a chocolate and they hatched about 120 ducklings for me over the few years I had them (about 40-45 were chocolates)