Nope, didnt quarantine. I asked everybody I know personally who has chickens, and they all said they had never quarantined anyone. I dont have the facilities to do that, anyway. Next time I get new birds--females only, please! I will rent a large dog crate and keep it in the garage. And I will only attempt this in nice weather.
I would definitely agree that they two roos were introduced to each other far too soon. My "separation pen" was a puppy playpen set in one side of the shed, with a blanket fastened over the top. It had seemed secure enough at the time. However, Apparently Connor got on it and jumped on it until he got into the pen. So then my kid let everybody out in the yard first, and told us about it later. I have no idea how to get the chickens to go back in thier shed once they are out, and they mostly run away from me, so we just left them out. That was my first mistake. Other mistakes I made included, putting Connor and not Seamus in the pen, returning Connor to the flock before his wound was fully healed, using a pen with openings that were too big, and putting the food and water containers at the front of the pen, so that Connor had to come within pecking range to get anything to eat or drink.
We are keeping the boys separated for a while, until Connor fully heals. We are going to let them take turns in the yard and hanging out with the girls. After Connor's comb heals, we are going to reinforce the puppy pen with a plywood top and line it with nylon hex mesh. They they can take turns staying in the pen at night and going in the yard during the day. When I have a couple of days off, I can start letting them have short contact.
I want to say thank you all for keeping me company on this journey. I completely freaked out when I found Connor cut and bloody for the third time. I was tired and rushed, trying to get out of the house to go attend to some family drama or other, and had already had 47 things go wrong in the 2 hours I had been awake after too little sleep. I just thought, "I can't do this. I made a horrible mistake, and I don't know how to undo it."
I feel much better now that I have a plan, and I know I can keep the two roos safe from each other until I have time to introduce them slowly. Rather than feeling I have to solve all their problems NOW!!!!!!!, I see that I can adjust their integration to my own schedule. In fact, it turns out that slower is better.
I have had pets my whole life, and I have never had so much trouble introducing one animal to the others. But then, I have mostly always had females.