I have heard of broodys who will not get off of the nest. they will literally die they are so devoted. Definitely removed her once a day and make sure she is back on the eggs before you leave. Usually I provide food and water in an enclosure within the coop and let the broody out to poop in the evening. My dearest girl, named Bantam (who was a bantam!) passed away last thursday. She was the best broody ever, so devoted. I miss her but she is in a happy place now.