OK I just got through a hatch of shipped eggs so here is my story...I received eggs from southern ID. and some from NC. I only live about 300 miles from south ID so those eggs never had to fly and were handled much less than the ones from NC. I received both packages on the same day and I let them rest for 24hr fat end up in an egg cartons. Then I put them in the bator with the turner off until day 4,at day 10ish I candled.I saw that almost all my eggs I got from s.ID had almost perfect air cells,but the ones from NC had 1 good air cell and 15 bad ones.and 4 of those stopped developing at this point so what happened in the end was i got a 80% hatch rate on the eggs that didn't "fly" and a 10% hatch rate on the eggs that came from NC and were in an airplane,all though i had most of the chicks go full term they just weren't able to hatch.The ones that did hatch were very weak compared to the others and needed a little extra TLC. I read that 4 different guys from different time periods did the same experiment,where they did 4 separate batches of eggs where on one batch they turned eggs every day,another they didn't turn at all,one they turned day 4 through 7,and the last they turned day 8 through 11. In the end they found that they eggs that they only turned on day 4 through 7 had all most the same hatch rate as the ones turned every day. Maybe that my be the trick to hatching eggs with messed up air cells,,,only turning day 4 through 7,and not turning again.I also noticed that the air cells that were messed up were pretty big by day 10 and huge by lock down,so maybe a little higher humidly also,maybe 50%+,Ill be getting some more shipped eggs soon and Ill try this idea,and let you know how it works.