sexing ducklings

[RaychulRobot]

Hi! I'm new here. I have a couple runner ducklings. I'm just curious as to how I can tell what gender they are. They're about 4 weeks old now, starting to get their feathers. Is there any way to tell besides vent sexing? Still peeping, definitely don't have their quacks yet...

Any help would be greatly appreciated.

 

[duckyfromoz]

Depending on what colour they are..you can sometimes tell by colour- but thats only when they are the Silver types rather than solid colour ones. If you cant hear quacks yet- you either will very soon- or you have all boys

I can sometimes pick a change in voice form around 18 days old- but usually I wait until they are 4 weeks old- and for some of them I have to wait even longer with mine.