It's interesting to note that all the eggs (except for the dud) in one container hatched while none of the eggs in the other container has even started pipping yet. Both containers are the same clutch of eggs. Which leads me to believe that one pipping starts all the eggs going. I'm pretty sure if I had put a pipping egg in the other container it would have started the hatching process in that container too. Next time I'm going to do that.