Mother nature built in a safety window for chicks, they do fine for 2-3 days after hatch on what they absorbed from the yolk just before hatch. This gives them time to wait for the other eggs to hatch. If the eggs were all started at the same time they should hatch within about 24hrs of each other.
I don't usually shift them to a floor box until the 2nd or 3rd day or after the last chick is dry if they all hatch about the same time. If you need to move them and eggs are still not hatched there is a risk the hen may leave the nest and eggs to care for the hatched chicks, this is a danger if a hatch is staggered (eggs set over multiple days) and you will need to be prepared with a backup plan for finishing incubation. The hen may stay on the nest, but no way of knowing for sure until you try, so close observation needed so early assistance/intervention can be given if needed.
You can offer the hen a drink of water in the nest if you have reason to be very concerned about dehydration, most healthy hens who ate daily during incubation are fine for a day or two without food at hatch time. Don't leave the water dish in the nest though, too much risk of it tipping and drowning chicks or causing wet bedding and chilling of chicks or eggs. Our hens are used to us and will take a drink when offered, not all hens are cooperative with 'stupid human tricks' though and she may ignore you.
Thank you! They were slightly staggered (3 on a Sunday night & 3 more on Monday morning.) She's completely comfortable with my DD Frankie, so I'll make sure shes hand watering her. I don't remember the last time I was this excited!
