The little pullets will do the same thing, not just the cockerels.
I wouldn't worry too much about them especially if they are raised together and you separate them the way I am constantly doing with my frazzled roo. Game breeds are a different ball game, and individuals from some regular breeds can be problematic. Just remember, the problem is only if they both think they are equal and are strong enough mentally to not back down. It's that commitment to fight to the end that gets you serious injuries. Game birds were bred for it. Other birds aren't as committed to win a fight. Most will have one that agrees to back down and the two will live in peace. They work usually it out. One other thing--I expected fighting roosters to make noise. In my experience they don't so you could have two roosters fighting to the death just around the corner of the house and never know.
That's good to know. I would think they make noise too. Lol. One of them is more hands on and the other one kind of watches things from the background. He will put things in place from time to time but mostly stays back. But the other one is Mr. Social. Lol