I have 13 - 5 week old chicks. They are all feathered and living in a broader in my garage. We unplug heat lamp durning the day and plug it in at night... When we open the broader they are flying out... So I really would love to get them in the coop. My question is when can I stop the heat lamp and move them? No way to use heat lamp in the coop so they will have to be done with it to move.... Been running in the 60's and 70's durning the day here and lows are mid 30's at night. Really need some advice... Thank you