Sex of my Welsh Harlequins

[Sunny Side Up]

Since you're going to be doing so much with ducks you should learn how to do vent sexing. It's fairly easy to do with waterfowl. Here's one instructional video on how to:

 

[jordannew1995]

These are my four welsh harlequin babies!
Can someone help sex them, i have no idea.. Cant decide whether they're girls or boys