Take out the cracked ones. As far as moving her.. eh. I don't know. I'm not an expert. My broody was a wild chicken up until 3 months ago. She isn't tame per say so I left her put and am letting her be the boss. Once the babies are hatched I'll have to brood them inside since she doesn't roost in the coop, I suppose.
Hi, you have to remove the cracked eggs or they will stink but as for Thelma, you have to leave her where she is! If you move her, she will leave her eggs to go hatch more somewhere else!