So far it's been hit or miss for me. I lost 1 out of 3 that were like that. 1 of the survivors was the runt which died recently and the other is a small chick in my current hatch who seems to be catching back up on his own.
I'd try giving it some water and if that doesn't work try some water with sugar or syrup. The sugar can give them a temporary energy boost so they start eating and drinking on their own. If your having trouble dipping it's beak in the water you can take a small syringe, squeeze a drop to the end, and then dip it's beak in the drop. Easier to see and they don't squirm as much as when you have to tip them downward to dip in a waterer. Do that a couple times a day for the next day or 2 and it will either start to recover or you'll know it's not going to make.