Game chickens love to fight it is just natural to them. He probably wants to fight so bad that it is making him aggressive to the hen. My bantam roos would cause a lot of damage due to pen fighting so they got locked up too. I still have a few game chickens left and have rubber muffs (that cover the spurs so they don't kill each other). Sometimes my roos will get aggressive like that so I have to take out the muffs and let the chickens go for about 30seconds. The put them back up and they are fine. I know some will think this is cruel, but there is no: talking it out, punching bag, counseling, restraining order, telling them to stop fighting, etc. I am the keeper and it is my responsibility to keep the peace even if it means letting them be (what they are) animals, game chickens at that. I am the Referee and so I make sure they are supervised during such. I have had to permanently separate new chicks at only a week old before do to aggression amongst stags. They would actually try to kill each other. So when someone says they are trained I have to highly disagree. Anyways....you could try to find something that looks like a rooster and let him take out his aggression that way. One year my local Walmart sold lawn ornaments that look like chickens, but were made of hard plastic (so I had to be careful so mine would not break their spurs), but it worked great. The roosters actually though they won the fight. 
You might could try separating him from his hen for a few days if nothing else. A rooster will kill a hen. I had one rooster that knocked this spurs off completely at a young age, he loved every hen we put him with and let them eat first and everything. But there was this one hen that would not let him top her and after about 4 days (all the while he let her have whatever she wanted) he decided enough was enough. I went outside the next morning and he had cracked her skull. It was upsetting. I kept him but was scared to try any more hens but later I did and it never happened again. I can only guess that he figured that she would not let him pass on his genes so she was no use to him. 
Edited by jeslewmazer - 2/3/10 at 1:08am
