oh yeah when you have a whole herd of them together it's hard to tell who is making what noise.Yes, "its the sometimes rasp, sometimes quack, all four birds are running together with their mouths open, which is making the quack????" moment of puberty I struggle with, which is why I usually need a few weeks of watching the birds at that age to be completely confident. If I raised them differently, kept more separation or handled them more, I'm sure it would be easier.
Have yet to mistake a drake feather, but if I see the curl, chase the bird, and it runs away rasping... its a drake.![]()
At about 6 weeks I usually start picking them up one by one and start to walk away from the herd. They will usually let me know real quick if they are a girl or not.

But mine are in a pen.
That's harder to do if they are out in the open.