I'm using the ECO glow 20 for the first time. I'm concerned that my day old chicks are not coming out from under it to eat and drink. They pop out and then run back in. Also, it seems like they have to stand up to be warm. As soon as they rest on their haunches they stand back up again as if they get cold. I have it set on the lowest to the ground setting. I'm almost ready to go back to mt heat lamp. I don't like not knowing what's going on under there! Any comments or words of encouragement? Everyone seems to love theirs.