I have 5 Mutt ducklings i got from the neighbor. They're getting older now and their tails are starting to feather in. What's the general age that mallard-derived ducks get their drake feathers? They're starting to get their voices now and it sounds like Maybe 2 girls, definitely 1..the voice-sexing method has been proven good many times in the past for me, but they're still young, about 5 weeks old. I am so used to my Muscovies that I have gone all retarded when it comes to other breeds, lol.