I'm usually pretty good about doing my research on these matters, but I think I've screwed up royally after noticing what's happened in the last 12 hours after doing some research. I have 6 five week old chicks and two of them ended up being roosters. I wanted layers only, so I looked into getting a couple more hens around the same age as my chicks to fill the void. I ended up finding a guy locally who had some hens that are 7 weeks old and same breed, barred rocks. I picked them up yesterday, put the finishing touches on my coop since there wasn't room in the brooder anymore, and put all 8 of the chicks into the new coop last night. I had noticed some squabbles with the new chicks and they were pretty much hanging together in the corner for the most part, but later in the night when I checked on them they were all laying down together in the middle of the coop. When I went out this morning to check on them, I only saw 6 chickens initially. I opened the door to check them out and the two new chicks were in one of the nesting boxes hiding out away from the others.
So now I'm sitting here reading all this stuff about having them in quarantine and what not for possible illness and also to help them acclimate to the new surroundings. But stupid me just tosses them in with the others thinking they will be just fine as their similar age and same breed. How badly have I screwed up and what can I do to fix this?