Oh goodness. I suppose all this teaching comes from the fact that we've bred most of the broodiness out of chickens, so along with it, the instinct to care for and teach their young?
(By the way, thanks azygous, like another poster said somewhere, it's like talking to a legend. I keep coming across Blooie's and your posts about MHP and that was my inspiration to do it right from the get go, instead of getting ready to lay hens).
I also tested my brooder because I was so nervous. I set it up before my flock came home and made a few adjustments because it was a bit cold. I still test it occasionally and now, inside my (somewhat) air conditioned home, the cave is reaching anywhere from 85-90. All day they run all around and jump on it and snuggle up inside it, so it was baffling when they wouldn't SLEEP in it...
Chicks are now a week old!! I can't believe how HUGE they are compared to day 1 already!!