If you notice your dominant roo picking on the younger (and also much LARGER) roo and go chase him down then pick him up and carry him around for half an hour lecturing him on bad behavior. I even brought him in the house so the kids could pet him to add to the humiliation.
The roo is a total jerk... he attacks my other roo, attacks the kids (they have a separate yard for safety reasons) and just plain isn't nice. But although I have been advocating his replacement for a year which often provokes hysterical crying fits from the kids, 5 and 7, now that they have started to come around and consider letting me re-home him its sad to think of giving him up. He's observant and protective, and man is he a survivor. He's the only chick to make it out of the incubator out of 32 eggs and the veteran of two brutal dog attacks what left him nearly crippled. He has since recovered fully, meaner than ever. And though its been a long time since he was a house pet we are still fond of the jerk.