My hen is laying on about 15 eggs. Found a chick that drowned in her water bowl this morning.
I checked the other eggs and have not seen any peck marks. I’m not sure what day I’m on. She surprised me with the nest! Since one hatched, I’d assume around 21 days.
Is it normal to not have any peck cracks in any of the other eggs?
Also, do I need to separate her and the chicks from the other hens/rooster when/if they hatch?

I checked the other eggs and have not seen any peck marks. I’m not sure what day I’m on. She surprised me with the nest! Since one hatched, I’d assume around 21 days.
Is it normal to not have any peck cracks in any of the other eggs?
Also, do I need to separate her and the chicks from the other hens/rooster when/if they hatch?