So I am a new chicken owner, and new to BYC, so I apologize if this topic has been covered time and again. I have 4 chicks that are 6 weeks old. They have been out in the coop for a week now, with a heat lamp, since the temps have been around 40-50 daytime and at or below freezing at night. This week it has been warmer and temps are in the 40's and 50's at night. Will they be okay without the heat lamp now? The temps are supposed to dip down in the 30's again next week, but are they at an age they will be okay without heat? I have 2 buff orpingtons and two black sex linked.