The chicks will be happy to be in a coop with more room. Yes, they will freak out at first because it's new. But they will settle in quick. I'm a new chick mama too, but had chickens my whole childhood until I flew the coop (haha). I just moved my 4 1/2 week old chicks out to their coop. I made sure to move them out mid-day so they had plenty of time to get settled in before night. Our temps got down to 38 their first night out there. No light, no heating pad... just each other. They are all fine this morning and running around like little monsters and just having a ball with all the extra room.