We have two 12 week old chicks (we had three, but one chose to greet the morning with a cokadoodledoo, so he was re-homed). Today we got two 10 week old chicks to take his place. We have the two new girls in a cage in the pen. They can all see each other . . . how do we put them together? I was thinking spending the night separate, then just having them all together when I open the coop in the morning. What do you think?? I am VERY new at this, and I don't want anyone to get hurt. The new girls are a little bit smaller than the two existing birds. Thanks for your input!!--Steph