You know, come to think of it, I've never hatched out a standard sized chick. Lot's and lot's of bantams though! I have 4 healthy peeping bantam Cochins, out of 4 eggs. They started Sunday night, day 21. But the Spitzhauben egg, and the Astralorp egg, nothing. They were in there at last candling, right along with the Cochins. This morning makes it day 22 1/2. Do they really take longer? Is there a difference between large and small eggs? They haven't even pipped. Any ideas?