For me, when roos squabble, I watch them closely. I have found some roos will not live with another and have to be the only roo in the flock..or blood/death occur. Other roos will allow a lower ranking (typically younger) roo and only give peck/chase now and then to keep them in line.
Whenever excessive fighting or blood is involved, we must step in. Roosters can do a lot of damage with ongoing fighting. Damage we may not even see..internal to the head/neck. I've seen roos knocked unconscious by other roos. If this type of behavior is seen, it is our responsibility to separate them and try to keep them safe (even from each other).
I had 2 araucana roos live together from baby up to 4 years. One day the low ranking roo had enough of being pushed aside. He stepped up and would not back down. Needless to say, the top roo wasn't backing down either. Till we caught them, they were both a bloody mess. After four years, who would have thought they just couldn't live together any longer. We ended up finding a home for the one roo and I was heartbroken to see him go, but it was for his own good/safety.