Like others said do not beat yourself up about it. Most likely was the PO. I have had some great hatches from shipped eggs and some really crappy ones! I had a box show up recently that had 2 dozen eggs in it. 4 arrived broke and 5 more had detached air cells inside the egg. Out of the 15 good ones I set in the incubator, 8 developed. So out of 24 eggs, if the 8 all hatch, I will have a 33% hatch rate all thanks to the PO. Another box I got had 9 eggs and out of all 9 of those, I have 8 of them developing. It really is a matter of who paid attention to the box and cared enough to not go "ooo, egg soccer!".
Also, heathersboers, I don't know when the ones you have now are due to hatch, but I have some in the incubator that are in the same boat yours are in. Over a 1/3 of the egg is air cell and those are going strong, they are suppose to hatch the 22 of this month. I have had some before that were shipped and got lost in the winter with air cells that took up half of the egg by the time they were due to hatch and they hatched out fine. I think I may have lost one just before it hatched, but it did not look fully formed when I cracked the egg open.
Don't give up, I agree with finding some barnyard mixes and giving them a try before the shipped eggs!
It's not the incubator, all I ever have used is the cheapy LG still airs! I do not use the trays in the bottom either till lockdown. I do add a half of a sponge wetted with warm water because I have really dry air, that puts humidity around 35% here. At lockdown I fill all the trays with warm water and add a towel over the trays that is wet with warm water also. It holds for about 2 days till the humidity starts to drop. I stick a syringe with tubing on the end and stick it in vent holes to add warm water to the towel and trays again and humidity jumps right back up.
