Do you have a box, cat carrier, dog carrier something...big enough for the hen & the chicks, that you can put them into over night...while you figure this out? My hen would come to me if I had her favorite snacks....remember shes been sitting, and will probably be ravenous-mine usually are. I usually partition off part of my coop for my broody & babies, then she doesn't have to "deal" with the other hens etc. The predators are more of a concern if she stays out. Is there more help you are looking for? what specifically can we help with?