Hiya, and welcome to BYC!
When I used to let the hens hatch, I always left them where they were until just before hatch time, then set up a box on the floor of the coop with their chick crumbles and little waterer with marbles in so they wouldn't drown. Nobody bothers them. Mom will defend and the rooster would help too if anyone got too close.
Once, I was late and the chicks came down the ramp themselves. I still set up a box then as I wasn't so sure they'd be able to go back up, so that way it was mom's choice and she had a Plan A or B lol.
Here's the ramps the chicks would come down from. Our coop was new in this picture. It's 8 years old now.
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