First attempt at integration was a big fail.
Surly, my top hen, sort of rules with an iron fist, but the other hens know that and leave her alone. She has even challenged me from time to time, which ends in me carrying her around while I do chores out there until she calms down, although she continues to grow under her breath the whole time.

She is also broody about every 3 weeks right now so I have to keep taking her out of the nest. But I think she is funny so I keep her.
But, this time she pushed me a bit far. I let the cockerels and pullets out. Within 30 seconds she pecked at Abby, who has never been pecked before. Poor Abby let out a big scream, so Mad, the larger cockerel, came over and Surly squared up with him, hackles up. His hackles came up and they were instantly in a death grip. I picked up Mad, because he was the closest to me, and he was bleeding already!

She bit his beautiful comb. So I sprayed a little Vetericyn on it and let him go. He was pretty riled and started stomping strangely around me, so I had to pick him up again and just sit there with him until he relaxed. When I put him down he was okay again and just went about his business with his tiny flock.
They are all separate again, and I'm giving it a few more weeks before I try again. If the other cockerel, Pippi, goes after the red spot, I'll spray Blu-Kote on him, but it's not likely Pippi will do that. He is smaller than Mad and Mad is clearly the leader of the flock. In fact, I had to pick Pippi up to put him back in his pen and when he complained Mad came running.
Mad's a good rooster. Surly is the one who could end up by herself for a while next time I try. I'll just take put her in a separate pen for a while.