Morning Update:
booboo the chick is still alive. i don't know how but ...
she was still on the bed (in her little tub, with water, on a heating pad) when i finally went to sleep at 11 something. up at 12:30 and she was barely moving. back to sleep and up at 1:30-ish. i just knew she wouldn't be alive the next time i checked so i moved her in that small tub and put her on top of the other chicks' tub. kinda hoping the sound of the other chicks would help her.
but she's a little fighter. when i checked on her at 2:30, she was still alive. dipped her beak in water (like i do every time i check on her). back up at 3:30 and she not only was alive but had moved a little. and had pooped! not much ... mostly water but still. dipped beak and went back to bed. up at 4:30, chirped once, dipped beak, back to bed. up at 5:45 and she's still alive. dipped beak.
It's 6:30 now and I've been doing a few things but now I'm gonna go back to sleep. heard her peep a few seconds ago. she's still lying there, barely panting, but responds weakly when i pick her up.
will check on her again when i wake up. didn't get much sleep but daggone, this little one is such a fighter!
i'll keep you posted. if you want.