I have 2 eggs in the hatcher right now that are either at the end of day 20 or the beginning of day 21. One of them appears to have gotten into the air sack (shadow of something very close to the shell) but doesn't seemed to have moved since last night. Is this normal or is the chick most likely dead at this point? The other doesn't seem to be doing much of anything. Which also concerns me a little. The temps have been fairly consistent, though not perfect. Sometimes a degree or two under 99.5, sometimes a degree or two over.