I am happy to report there's a big glob of broody poop in the shop! I neglected to update that there were signs that the broody was actually eating and drinking last week. Thanks to the reassurances of y'all knowledgeable folks, I relaxed and just checked once a day. She's still sitting tight; started mid-day March 23rd, so hopefully there will be two new chicks in the world in the next few days. Thanks again for easing my mind and to the entire BYC community for sharing information in all things chicken.
Good luck on the upcoming hatch. I have a setting hatching next weekend.