I have been hatching eggs for quite a few years. The last three sets of eggs I ordered I have had extreme trouble hatching. My last batch I had 15 Jersey Giant eggs and 8 Brown Leghorn eggs. These were the eggs that passed the viability test at Day 18, meaning they were all fertile and had chicks inside. On Day 21 I hatched 11 of my Jersey Giants, but only 1 of my Brown Leghorns. After waiting 24 hours after the first chick hatched, I took out the 12 chicks and noted that 2 of the Leghorn eggs had pipped considerably, but were the driest I ever saw. I took some warm water and was able to get the shell off of them, something they could not have possibly done. The hatcher shows humidity between 70 and 78 so I have no idea why the eggs would be so dry. I do keep the humidity low during the first 18 days, but since my eggs from my own flocks hatched so well, I think I am doing everything right, but wonder if there is something extra I can do for eggs I received through the mail. Is this common? Any advice would be appreciated. Just for further information, I set 17 eggs two weeks ago that I received in a shipment and only hatched 4 out of 9 fertile, but with my last Jersey Giant hatch, hatched 100%.