There is no doubt at all, that the more roosters you have, the greater the chance of it going wrong. Being raised together has no influence in how they behave toward each other, and the idea, that if you have enough hens, they will share is also false. Multiple roosters in a backyard set up generally do not work over the long term. Each rooster wants all of the hens and will fight for them.
They don't call it cock fighting for nothing. These things are the options:
- They never fight (this does not happen often, but it can)
- They fight, settle it, never fight again
- They fight, cause damage - separate to fight another day
- They fight until one of them is dead.
There is no way of knowing how it is going to go. Personally, I would not keep 2 roosters unless I had 25 hens and enough space for them to range a wide area. Not in a typical backyard.
The other thing, that you may not be aware of, as it is less dramatic, but two fighting roosters cause a lot of stress and tension in the hen part of the flock. They are constantly on alert.
I would keep one, and remove the other from your flock. I don't like cock fighting, whether or not, people are paying to watch. Fighting is fighting, and I don't keep them in my flock.
Mrs K