penis prolapse

I noticed this morning that something popped out of my pet duck when it was going to the toilet. It's out quite a way and even if he manages to retract it, he is still out of his body a little. It's autumn in the southern hemisphere and there aren't any female ducks around (only have 2 drakes)...

To get right to it: today I noticed that one of my drakes, Luna, had his penis pop out when he was pooping. About an inch came out, dangled there for 1-2 seconds, and then it went back in. I stared him down for way too long and it watched it happen multiple times. This was not happening last...

I’ve just noticed my drake’s penis is hanging out slightly after mating, I noticed it maybe 15 minutes ago and it hasn’t gone back in yet. Should I be worried? How long does it usually take to retract and what’s the best thing to do if it is a prolapse?