I have 17, 6.5-week old chicks that I would like to integrate into my flock of 24. The older (almost 6 months old) chickens usually are allowed to free range in the afternoons until dusk. Currently, my coop is just one big room (approx 8x8). I've thought about sectioning off an area for the little ones to stay in, inside the coop, but I have no easy way to let them outside without them mingling with the others and then leaving the run when we let them out to free range. I had planned to keep them "together but separate" for about a week so they'd become more accustomed to seeing each other. Any advice from the folks who've done this before?