I just hatched 9 chicks and had 5 that did not hatch. This is only day 21 This is the thing. I checked after all the pipped eggs where hatched...the others left. I wanted to get chicks out so....4 of the eggs where DIS..air cells had drawn down which I am trying to figure out why. I run temp at 99.5 and H 45 average..during LD raise H to 60-65...sometimes it raises more when chicks start hatching. OK..this one egg left had movement and I can hear faint pecks and see its head moving. I am so afraid it will do like the others and the air cell will enlarge..thicken and trap the chick. Should I leave it??? or help it??? Concerned with only have 1 egg in there could make a difference.