The same thing happened to me with the free bobwhite eggs that came with my incubator. Lockdown was Saturday and within a couple hours some of them had pipped. Yesterday on Easter Sunday, one hatched at around 6 pm and more than half of them have pips. It is now almost noon on Monday and no more have hatched or shown any progress. The poor little one is hiding underneath the paper egg tray. It's a good thing that I cut the top off of all the "nubs" on the tray. He's just tunneling underneath the other eggs and waiting for someone else to come out and play.