so about 5 days ago was my first time ever hatching chicks for another girl who let me barrow her incubator to hatch a clutch of 12 eggs for her 4 hatched and doing wonderful i just gave them to her today. 4 eggs were unfertile,4 hatched one had a thin hairline crack in it when i got it and it died early on and one died i would guess on day 10. one was fully formed and ready to hatch but i seen must have gotten shrink wrapped when i was taking chicks out of the incubator. but 2 of them had made small openings in the eggs and were chirping strongly but those two died before making the openings any bigger. when i opened the eggs both had the egg yolks absorbed and were perfectly normal from what i could tell the membrane of both eggs were normal and soft just the like other chicks who had hatched. so my question is why didnt these two hatch? my thought was that both of these chicks were differant from the ones that had hatched becuase there heads were facing downward could this have cuased them trouble having all there body weight on top of there heads making them unable to move enough to break out more?