What gender are my two 4 week old ducklings?????

[TheMauveDuck]

My ducklings are 4+ weeks old, I really need to know their genders but have the slightest idea of how to tell. They're a mix of Ancona, Harlequinn, Shetland, and Snyder. I'm really hoping they're girls please help!

 

[gamebirdsonly]

hard to tell at that age. Have to wait until they feather out more.