I had such great advise last time, here goes question #2. My first flock has adjusted to their new outdoor pen great (about 6 weeks ago). I still have 4 chicks inside (Australorp, 2 Silkies & a Sultan) that I have not yet moved out. These chicks were 3 weeks younger then the others so I kept them separated. I have introduced them all several times in the outdoor coop but bring the younger ones in at night because, even though they don't fight, the two flocks have not yet joined one another and the younger chicks have not learned to go up the ramp yet. At night they end up huddled together in a corner of the coop. My inside chicks have their feathers but are still considerably smaller than the others. How can I move them outside with the other flock permanently? The temperatur is not in the lower 40's at night with no heatlamp. Thanks!