You probably already know this but just in case, it's best to check for lice and mites well after dark, using a headlamp, checking around the vent, under wings, and neck feathers. I was advised to run a slightly damp white paper towel under the roost to check for red specks (red roost mites)...
Hi. I'm so sorry she's got you worried. Most of her behavior does sound like typical broody behavior, but a couple of things are concerning to me. Her unnatural head movements and her seeming confused. Broodies will oftentimes get lice and/or mites because they spend so much time sitting. Have...