I had problems with shipped eggs as well. Like others my eggs were packed perfectly. Batch one 5 of 12 hatched mainly due to a good Orp broody. Next batch was 0% of 18, One egg was cracked in the bubble wrap and my old incubator would change temp often despite it being in a basement with a constant temp. I got a Hova Bator 1588 for Christmas and I tried 10 eggs, they were some fresh some 9 days old. I got one to hatch, my fault I let the water get out around day 15 and one hatched. Now that spring is here I want to try again and get better results. If the first eggs had never hatched I would have given up. I wish I knew about letting eggs sit after shipping, it would have helped.