I'd separate the drakes where they can still see each other and give the new drake some girls of his own. I have to do that here to keep the piece or fighting is non stop, until breeding season is over.
but these drakes know each other, came from the same home, but they were free ranged and here they can't free range. Do you think when our larger coop is done that they will settle down a little more? I put food closer to where the drKe picked on stays.