Are these your only chickens? If so, that might not be an all bad thing. You would have a lovely bachelor flock. If you have any females, I would separate them from these cockerels ASAP. Once they get to wanting to breed, they will harass the pullets to no end. They will gang breed, chase them from food and water, and give them no peace. (This is the voice of experience speaking.) Once they’re separated, you can take some time to figure out which one you want to keep.