That's good info. I'll have to remember this when/if mine ever go broody.I would mark all eggs in the box now, and whenever a new egg is laid remove it. You want a max of around 3 days difference in hatching, otherwise the hen will choose between unhatched eggs or hungry chicks. Some hens don't wait that long and get off after a day or so, others wait for all the eggs to hatch even if some never will.