Amazing, after 72 hours sInce our first chick hatched, the last one that we thought was dead in the egg, is still alive.
Coming home from work last night, it was 48 hours since there was any activity in the incubator, so I assumed the last few eggs were all dead and shut it off...but two hours later, I was hearing loud chirping, thought it was from the 7 babies in their brooder, checked on them and they looked at me like I was crazy. Then I realized the chirping was coming from the incubator!
The last tiny chick was still trying hard to hatch - kicking its legs to get out of the sheIl. I know we're not supposed to help them, but by this time the shell and membrane was dried-out and stuck to the chick, so I gently broke the shell into pieces and took a washcloth with warm water to rinse off all the stuck membrane. I figured, if we do nothing at all, it will die for sure, but if I gently try, at least it might have a small chance.
I had to rinse it in warm water to detach all the sticky shells and membrane, then gave it few cc's of chick booster from a syringe (and it was able to drink) then put it back in the incubator with some food and water. It was really weak, could barely hold its head up or get its legs under it to walk.
Tonight (24 hours later) the chick was able to stand up and stagger around, though still weak and not very active. So I took it out of the incubator and put it in a small container with chick-booster water and food, next to the healthy chicks' brooder, with a heat-mat and able to share the big chicks' heat lamp. It's still not very strong, but able to walk better, eat food and drink chick-booster water, and starting to hold its head up while staggering around.
Still not sure if it will survive, but we hope it does and we're doing our best.