We give most of our hens one or two eggs the day before they are due so the feel and hear the chicks, but I have a couple of hens who are great mothers but have crushed hatching eggs, so they get chicks as soon as they are dry and seem very happy with that. We have made screens out of 1/2 inch hardware cloth to block off the nest for the first day, then move them to a floor box once the hen seems happy to be in mommy mode.
Thank you! This was actually my thought as well. I appreciate your response!