The chick is doing incredibly well! A friend named her "Kinkles" (due the the kink in her neck).
I dissolved the "Electrolyte Plus" in their water over the last two days so whether this helped or not, I'll never know. She's been eating and drinking plenty and is probably one of the most active of the chicks of the lot. She actually really likes "hanging out by the water cooler".
She was forth chick to hatch of 21, but I recall how unwell she seemed when she hatched. I'm really glad I didn't impulsively "off" her later that day.
Thanks for all the advice and mostly for giving me hope that she may recover. She's made it 3-1/2 day so here's hoping. Finger's crossed.
It was our first attempt at incubating. We put in 26 eggs and after candling on day 8, ruled that 4 of them were infertile and removed them. Of the remaining 22, only one didn't hatch and when we broke it open, there was nothing in it but rotton goo so we must have missed it during the candling.
That's 100% success hatch rate on the fertile eggs! We're rather proud of ourselves.