Broodey sitting on eggs from differant dates

[g&h farm]

So my cochin hen is currentley hatching out babies. My question is, some of these eggs are from differant dates, will they all hatch? After she started sitting, when she would get up for food or water the other girls would sneak in and lay, I moved her once I figured out what was going on but this happened for a few day possibly even a week. Any advice?

 

[Judy]

At some point after some of the chicks hatch, the next day usually. she will decide it's time to teach them to eat and drink, and she will abandon any unhatched eggs to be out and about with the chicks.