We had the same dilemma and ended up leaving mama in the nesting box until all the babies were hatched. We did put up a little barricade after one of the babies fell out. On day 22, we moved everyone (including the 3 unhatched eggs just in case) to the floor of the coop. Hen still sat on them for another day, then we tossed them. We have 5 other hens and none caused a real problem, but we did see a few scuffles where mama had to give them (and our schnauzer) "what for" for getting too close. She kept the babies inside for a few days, then started taking them out. We did have 3 days of anxiety when it was time for her to take them in for the night and a couple just couldn't figure out how to get back in. We helped guide them in and from then on it's been great!! They are 6 weeks old today and mama just started laying again. They still gather around her some, but appear to be pretty independent now. Have fun. It's pretty amazing to watch. And BTW - they aren't much less friendly than our human raised chicks. I think they learned to somewhat trust us from mama hen.