AAAARRRRGGGGHHHH! I moved the babies into one of the barn stalls when they got too big for the water tub they were living in. Now a horse needs it back. They're too small to put in with the big girls. HELP!
My suggestion would be to build a Junior pen. Perhaps you can section off a corner in the barn for them.
I myself like allowing them to get outside some when they are big enough so my personal vote is a pen just for them. It does not need to be fancy just functional since you will be integrating them in the future.
i raise mine the exact same way , and when horse needs a stall i simply square off a corner with some chicken wire and then keep there food and water in there with short roost and i cut several small holes in the wire big enough for the chicks to crawl under with plenty of room , it helps the chicks get acclimated to the flock but still have a place to run and hide if they need to , dont add the holes until they have been in the new smaller cage in the coop for about a week so they no it is there home , i have also used the same method to feed chicks separate from the flock , i hope this helps