Serious fights follow certain breeds, especially game types. That doesn't mean others will never get really violent, just less likely. I have had at least roosters as long as I have had my flock, for more than a year. Since rebuilding my flock, I now have 4 roosters and 3 hens in the same large pen. My copper blue maran quickly made it clear that he is number one, and my original Lt., a RIR, has resumed his position as number 2. The other 2 boys, a Dominique and a buff cochin that are both about 6 mos, follow the Lt around for the most part. After the initial sparring matches they all get along fine, although the arrangement is temporary until my latest batch of chicks is old enough to introduce and separate.
As others have said, watching roos divide duties is really interesting. There are some things they can do, and some things they can't. My Lts. have always tried to present treats to lower level hens, but it usually results in a chase. With enough hens to go around, a couple will usually begin hanging around the Lt. without getting him into trouble. They'll roost with him and all, but don't be shocked when the glorious leader decides to mate one of his Lts hens right in front of him. There is still a lot of dominance going on, but its better for the flock to have multiple roos, and that Lt is always there to step up should something happen to the leader.
Ken
