Chickens will eat the dumbest things. One of my pullets ate an old piece of duct tape and naturally I got worried. I posted a thread about it, and someone told me their chick ate a metal nut and survived. I would think that if a chick ate something like that and survived, your grown hen should...
That happened years ago to my mother when one of my grand-mother's Tyson chickens ate my Mom's earring. Took the chicken to my great-grandmother where she killed and cut open the chicken and retrieved the earring. (this was before my time, but was told the story) Lesson learned: Do not wear...