So I just finished hatching in an incubator for the first time. 4 eggs of 22 were removed prior to lockdown. 14 eggs hatched in a 48 hour period. 2 days after the last hatch I opened the last 4 eggs. 3 were fully developed chicks that looked like the same breed. Can anyone tell me why the may not have hatched so I can prevent this from happening again. We did open the incubator twice to remove dry chicks but there were no pips visible when we did it.