This is my first time hatching chickens. I have a still air incubator that I've kept at 99.5 degrees and between 55-65% humidity. They have been in there since 8/24 and began hatching today. One was born earlier with no issues until he hatched. He has (from what I've read) the yolk sac still attached. He hasn't absorbed it yet. What do I do? I read on here to separate the chicken from the others and wrap it in a wet paper towel to give it a chance to absorb. That's what I have done so far. He seems lively and wants to move around a lot and chirp. I wrapped him up tight with his head outside of the towel and left him in the incubator. Is there anything else I should do?