I have had ducks for a couple of years now but am wondering if something could be wrong with one of my female calls or if it's just that she is "in season"?
I noticed a couple of days ago that what I think might be called the cloaca is protruding and seems to stay out, though I admit I don't constantly look. She acts perfectly healthy and right now is with 3 females and 1 male duck who I have seen mate her but doesn't overmate. I think I saw something like this last year with one of my female calls, but as I remember it didn't stay protruding.
Here is a pic:

Should I be concerned?
I noticed a couple of days ago that what I think might be called the cloaca is protruding and seems to stay out, though I admit I don't constantly look. She acts perfectly healthy and right now is with 3 females and 1 male duck who I have seen mate her but doesn't overmate. I think I saw something like this last year with one of my female calls, but as I remember it didn't stay protruding.
Here is a pic:
Should I be concerned?