Hello! I wanted to know what to do about my brinsea brooder. My girls are about 13 days old and we've had a heat lamp since I got them, however, now I want to change to the Brinsea ecoglow and I'm having a little trouble. I turned off the lamp, put the brinsea on the lowest rung and nudged the girls underneath - but they won't stay under there, I check on them half an hour later and they're huddled together next to it. When I put it up a rung, they all go underneath and huddle together, but I'm afraid they aren't warm enough since they aren't touching the plate. Any advice? They are delawares and cinnamon queens, not bantams, if that helps the size approximation.