I just got a premier 1 heating plate... the chicks will not go under it- I’ve been adjusting the height and putting them back under there. I’m guessing if they were cold they would use it? They are not cheeping loudly or anything, they have been taking naps like in the picture, I have the heat plate angled to give the taller ones a tad more room. I just don’t want them to freeze! Opinions? Advice?