From experience, I have learned not to just 'look' at the eggs to be sure they aren't cracked; but I move them all. Sometimes they are cracked on the bottoms and you wouldn't know just by 'looking' at the tops, so if I can move them all I know none are cracked unless very recently cause if they have been cracked on the bottoms, the egg seeps out and acts like a glue and sticks the egg to the bottom of the carton so they won't move.