Roosters can be a challenge sometimes. Don't get me wrong–I love roosters! But they can be territorial and protective of what they regard as “their” hens. That's part of their charm, of course, but when they compete with one another too much, they can hurt each other, or even hurt the hens!
Will 2 cockerels fight?
Cockerels from the same brood can live together indefinitely if there are no hens around. Based on these facts, cockerels seem like quite peaceful animals. On the other hand, if two mature cockerels meet each other for the first time, there will almost certainly be a battle, quite possibly to the death.
Can you keep cockerels together?
During the winter, I put all of my different hens together in one big coop and run that hasn't been in use over the autumn months. ... We keep cockerels together over the winter on our smallholding, but it takes some careful introductions, so there aren't fights.