I have 26 baby chicks due in May 20th. I have a 32x52 inch water trough 24" deep for my brooder, but I imagine they will out grow that in just 2-3 wks. I don't want to spend more money on a grow out pen and I was hoping I could just turn them loose in the big coop. It is 8x20. I can section it off to keep them a little tight and expand as they grow. If I keep it warm enough with a light, would that be ok? I would like for them to get used to it asap and hopefully go in at night on their own once I start letting them out into the pen during the day. I'm getting very excited and can hardly contain my Grand- daughter. This is fun, so far. I hope reality is as much.