I have three young ducks all about three months old, two rouens and a pekin. I thought I had two hens and a drake. They stared mating recently and I didn't think much of it but today one of my rouens finished "mating" with my pekin then got into the position a female duck would to mate and my other rouen mated with "her/him". I little confused now, obviously, and I've read that male ducks will occasionally have sex with other male ducks using force. But the Rouen didn't do anything to stop the other. Any thoughts?