Ok, well then I believe the rest of the older chicks will be going to the coop today! It's supposed to be in the low 60s for the next three nights so they should be fine. On the nights it's supposed to get in the 40s I will turn on the heat lamp for them. Also trying to get them a temp "play area" together so they can have a little outside play time each day till my husband can get back home from work and finish their temp run to help integrate with the big hens!