Very rude duck!!!!!!

Fellow forum people, advice needed!!!   I have a very Very rude duck!!!   :blink: :blink: :blink:
He is nine months old and a s*x pest!!!  I know spring has sprung but this is ridiculous!!  He is in a run with a mix of lady ducks, chickens and bantams.  He is treading his ladies but what i am worried about is that he is hounding a couple of the chickens including a banty.  He is pining them down and doing his stuff, he is coming away with beakfulls  of feathers and really making them squeal!!!  He is a BEAST!!!!   

Should I separate him and keep him in a run just with the ducks?  Is the behaviour just because he is young? or spring?  It is unfair to my hens as nowhere is safe when he is on the rampage! 

Any help much appreciated.

My girls thank you in advance!!!!   

I don't keep ducks myself, but have read plenty on here about what a menace they can be come breeding season.  People have had their female ducks killed by them being over amorous, so I would separate him from the poor chickens at least. 

I'm not sure if it would work to keep him alone or whether he would quack the place down if he had no ladies at all. Sure there will be duck folk on soon with more detailed advice 

Many thanks, I have separated ducks and chickens today.  Chickens are most relieved!!!

Will keep them this way for a while, I have also dropped the water level so hopefully this will result  in no fatalities.x