Hi- I'm new here and my chicks are 3 weeks old. I just turned off the heating lamp last night as the temperature has been warm enough inside the house. We've had a heat wave and I don't think I'll need the heat lamp any further unless we get a cold spell. Some of the chicks are pretty well feathered already. Last night when I tried to turn the light off they freaked out in the dark and would not stop chirping. I had to leave a 60 watt light on all night long. Tonight as soon as it got dark they started crying out again. Do they just need to get used to the dark or should I leave a light on for them? Thanks!