I am hatching for the first time and on day 14. When I candled my 2 eggs this am they were both moving around and looking good but I realised one had no air sac in it anywhere I could find! It appears the vein network is attatched all over the fat portion of the egg as well as the narrower part. Is this heard of? I heard of air sacs moving usually in shipped eggs but these were from my own hens and went straight from the coop to the Bator plus it doesn't appear detached it looks completely absent. I can't remember if I ever saw and air sac in this egg.