My neighbor has 20 Indian Runner Duck ducklings. She is wanting to give the males to a friend, but doesn't know how to sex the ducklings. They are starting to feather out, and I think they are between 4-6 or 8 weeks old. Can anyone help her sex them? Can anyone tell us how to sex them? She would like to get them separated soon... she's running out of room for all 20!
Thank you!!

