With my first group, when I started figuring out who the cockerels were and they started fighting more and more, I borrowed some large parrot cages from my sister and put some of them in those. I had two cockerels that got along and they went into one cage, and another cockerel was by himself. I kept the cages next to each other though because I didn't want the loner to forget he is part of a flock. The "Loner" turned out to be Ricky Roo, the one who is happiest when sitting on someone's shoulder! I was afraid that my birds from Mary Ann would not be as acclimated to people as my Lund birds, since it's a bigger group and they have not gotten much individual attention. I was pleasantly wrong! Same as you, I go into the runs (I bring a chair though..lol, or just stand), and I wind up covered in friendly little birds!
You may have to figure out a way to separate some of your cockerels out of the flock until you are ready to start culling. I also have a large guinea pig cage that I have used to transport birds, and I may use that to separate some of my current little cockerels. I wouldn't worry too much about the pullets fighting as long as they have enough space and aren't fighting out of sheer boredom. The girls have to work out their pecking order, but in my limited experience, even though they may look fierce, I have never seen them injure each other. I also bought some cheap parrot toys when my birds were little and I was worried about boredom. They were hanging toys with coconut fibers and I would sprinkle feed all over it so they could hunt and peck for feed on the toys. They seemed to enjoy that. Something to keep them busy. I would sit in the coop/run with them for awhile at least once a day if you can do it. Again it gives them something else to do and think about and of course helps keep them tame.
I have identified two, possibly 3, RC boys that I need to find homes for. I hope to be able to tell for sure by the end of this week. I have my two RC boys from Lund, and I don't need any more RC boys, so that makes culling that group easy. My SC boys from Mary Ann are another story. I only want to keep two of them and I think I have 5, maybe 6. I want them to mature a lot more before I decide who to give away. I do not relish the thought of bringing birds back into the house to live (the dust gets everywhere!), but I may have to do so. Is anyone within 100 miles of the St. Louis area who would like a few Nankin cockerels? So far I don't see any faults with any of them. They are all quite possibly good show birds.
My suggestion Tyler, but as you know I'm very new to this too, is to start looking critically at your cockerels and start trying to figure out who to cull. You want to wait as long as possible (I have heard recommendations of a year if you can), but you also can't have them tearing each other up for a year. Look at the standard and if you see any disqualifications on any of your boys pop up in the coming weeks, you know they need to go. How many boys are you wanting to keep? RC or SC? I read somewhere that breeding RC and SC together can produce some goofy looking combs. I'm not sure if that's an accurate statement or not, but I am keeping my RC groups and SC groups separate. The two cockerels I gave away, one had a telescoping RC comb (disqualification), and the other had a bent SC. The bent SC may not have been genetic and his offspring may have been ok, but he was VERY light colored and had almost white legs (white legs are not good). I know you shouldn't cull based on color alone, but compared to my other birds, you could really see a difference and I had to cull someone. I told the lady I gave them to what their faults were, and she is keeping them as pets and not as breeders. The two got along great and had never been separated. So I hope they are doing well.
Anyone who gets these posts....PLEASE feel free to add your comments! If you disagree with something I've said, PLEASE let me know! I want to keep my mistakes to a minimum and need any advice that I can get!