My chicks are 5.5 weeks and nearly 8 weeks old. They were in the house with a heat lamp until about 2 weeks ago. They have been in the garage with a heat lamp for the past 2 weeks. I hope to move them to the coop next week. Should they be ok tonight in the garage with no heat lamp to transition? We live in North Carolina. Lows are around 30 at night right now.