I raise groups of boys together all the time. If they grow up together there is usually no problem. Many of my breeding pens consist of the girls and two boys that were the top two from the group. That usually works, but sometimes it is too much for the girls and needs to be reduced to one.
I also keep bachelor pens. For the most part they get along if there is no girl involved, then they start to tussle (like teenaged boys). You'll find you can't take one out for any reason and hope to be able to return him to the pen, that won't work. Once the pen is established as belonging to the other roo, then there will be territorial warfare.
Also with bachelor pens, there will at times be a little fighting. You have to keep an eye on things. If it's a Camp Kenmore pen for me, I don't worry too much about it unless they start to do real damage to each other. If it's a spare pen for show roosters, then I really have to watch for any damage.
Some breeds get along better than others. I have a pen of bantam BR. There are 8-10 hens and 3 roosters. No one gets picked on, but the most submissive rooster spends a lot of his time standing off to the side, obviously ruled by intimidation.
In a holding pen for processing, I needed to put in a bunch of boys. There was one big cream legbar roo living there by himself. I put in five Icelandic boys, not a single fight. A couple of days later, I added one more OE boy and again no fighting. I was even amazed how seamlessly the seven boys lived together. I never once saw a fight, they probably would have been a gang of thugs if I turned them out loose, they seemed to be working together![]()
thanks for the detail, Deb, and to all three of you for the thoughts -- so perhaps i should keep the boys in their own pen? it will be side by side with the pen with the girl chicks in it, so they'll be able to see each other easily -- will that be any different than just keeping them all together in one pen?