Shortstack (a Pancake chick) is 2-3 days behind its siblings. I think it was a pullet egg, smallish and hard as a rock. I made the air hole yesterday morning. This morning it was screaming through the hole, this evening nothing. I tapped and didn't get cheeping, but I could see breathing. I started chipping at the shell, couldn't find the beak. Found a couple veins, but no bleeding. Finally found the beak. I wet the membrane and put it back. Outdoor humidity is 84%.