I went to collect eggs tonight and found a motionless chicken on the nest. I got a flashlight and looked again. I poked her and the noise which emanated from her confirmed my suspicions. It was obvious to me. She has become possessed. I placed her on the roost. It's too dark for her to figure out how to get down and back to the nest. I guess tomorrow I'll see what she's up to and if she is still possessed, I guess I'll be performing an exorcism via rabbit cage. Maybe one day I'll let her hatch some chicks but now is not the time or place. Until then, being that these are my first chickens, I'll eagerly await my badge of broody honor.