Many roosters will go through a period at about five or six months old where they suddenly become more aggressive. This is because they are reaching sexual maturity, and they suddenly have new hormones racing through their bodies, and begin crowing, among other things!

Will 2 cockerels fight?

Many roosters can co-exsist peacefully in one pen as long as there are no hens to fight over. Don't separate the boys from each other or they might forget that they know each other and start fighting when they are re-introduced. That would guarantee you would need to re-home one of them.

How do you stop a cockerel from fighting?

The only way to stop cockerels fighting is to separate them, and if your chickens are both cockerels this is what you will need to do. Hens are less violent than cockerels, but they will often attack new hens introduced to their flock in order to establish the pecking order.