I think they are just laid that way, cuz they do not roll around, they are just air cells on the side of the egg...and they sure do not want to hatch !I have Black Copper Marans and Barnevelders in the incubator and I did not see an air cell in one of the Barnevelder eggs when I was candeling so I thought the egg was infertile. When I looked more carefully trying to see if there was any sign of life I noticed that there is an air cell in the middle of the egg. I drove the eggs less than 10 miles so I wonder how the air cell ended up on the side of the egg. I am curious how it will effect hatching.