I have moved my 5 and 6 week old chickens to their coop/run. This is their second night in the coop. There is a lot of peeping coming from the coop. Last night we did not turn on the heat lamp and they were quiet. Tonight it’s raining and low of 55. So I turned on the heat lamp. The temperature is around 72 and there is a vent open at the top of the coop. I’ve checked on them and they are all on the roost - far end away from the heat lamp. Should I unplug the heat lamp?? They are all fully feathered.