Sorry I didn't reply, I've been obsessing and redoing the brooder a million times lol well, plus washing another pool out im the dark and scrubbing algae off then bringing it upstairs then putting towels and cardboard down then I put the small one inside the bigger one then shavings on the outside. Now I'm about to take individual day one photos (I know, I need to stop bugging them but I actually let them sleep a while, the light was off for at least an hour after I initially set it up then I've only been in and out a few times (clearing a bunch of stuff to make room for the big pool actually, forgot about that step haha) and they very quickly learned to ignore the light and noise (when i first turned the light back on they made noise again but I've since left it on and they went back to sleep).
I'm actually about to bring the whole thing inside to the upstairs bathroom because I'm sooo worried about them and my mom said I could. She did say they have to go back out though
but it's just cause I'm so worried about the mice and the fencing we have won't keep a mouse out and I know they'll chew through cardboard so tonight inside it is (lucky little chicks lol) and then we will naybe buy some hardware cloth or metal sheets and figure something out about the mice haha