Yeah they do try to mate the khakis but the don't mate them as much as the khakis would like

, one of them can I think he has been doing it for longer but my other one recently lost his call duck mate and only just started trying (him and his brother are 9 month old and so was his mate but she died we think of egg bound after laying her first real sized egg) and he keeps falling of it is hilarious to watch

I wonder why yours don't mate all of your females, maybe you don't see them? I only recently started seeing them but I know they have been doing it for a while