Not sure if @azygous uses one...but I have, here's my blurb on a huddle box.....not sure where I got the idea<shrugs>.I always get confused but it's either @aart or @azygous -or both- who make huddle boxes. It's a cardboard box with a chick sized opening in one side, and you set it out there upside down on the floor of the coop. You can fill the floor of it with hay or straw, and I think she used some kind of reflective insulation on the inside. I'm hoping someone will wander in here and help me get my foot out of my mouth now...... You might have to kinda stuff the chicks in there and hold your hand over it until they figure out that it's dry, safe and getting warmer in there, I don't know.
I liked the idea because it replaced the overhead 'security' once they didn't need the pad heat anymore, and blocked any breezes out in large coop.
Make them a 'huddle box', put it in the brooder after turning off the heat(you might have to 'persuade' them to use it) then move it out to the coop with them.
Cardboard box with a bottom a little bigger than what they need to cuddle next to each other without piling and tall enough for them to stand in.
Cut an opening on one side a couple inches from bottom and big enough for 2-3 of them to go thru at once.
Fill the bottom with some pine shavings an inch or so deep.
This will give them a cozy place to sleep/rest, block any drafts and help hold their body heat in.
Yep, mine too....it's just simpler IMO.My pad goes on top of the frame, too. And my grow-out coop is a rabbit hutch, so it really is just a big huddle box.