Thanks for the reply. They are cream legbar eggs so they are very light blue. I did not mark the air cells since I am weighing then instead. I had six different breeds in the incubator. All the eggs are very well developed and have a nice dark embryo inside and a well defined air cell.(except the legbars). One one legbar eggs looks normal. The rest of them seem to have quit growing. This is my first time hatching with an incubator, but I'm pretty sure the legbars are quitters. Hatching with a broody was so much easier!