Thank you all!
It survived the night under mom. I moved the little family into a dog crate on the ground floor of the coop while it was still dark out. I'm excited to check ok them I the daylight soon.
Help!
My second chick hatched but I just found it by itself. The hen moved a little and it was cold, but alive. I put it back under her. Can I warm it under a brooder plate to dry it out overnight? I reduced the amount of space she has for the night & moved food/water so she can reach it...