Oh dear... duck mounting the chicken

[AKnewbie]

We have a drake and a hen duck along with the nine Australorps.
They share a run but they have separate sleeping quarters.vI thought they were getting along fine as they seemed to leave each other alone for the most part (the drake and hen duck are always together).
Today, I saw the drake on top of one of the Australorps.

Is this going to be a problem?
If I put in an additional female duck (or two), will the duck be able to differentiate among the species?

 

[Kevin565]

This is a major problem. A drake's penis was made very differently from a rooster's. If this continues he can cause internal damage to her and even kill her. Adding female ducks may help but now that he knows he can mate chickens he may never stop.

 

[AKnewbie]

Thanks. I will be observing for a while and if needed, they can have a separate run as well.
Thank you.