Went out to the coop this morning and a hen was dead sitting on eggs. She didnt seem broody the day before. All the hens seem to be molting their bums are featherless. Egg production has slowed a ton figured the molting. I am puzzled she looked healthy the day before and the rest of the flock looks healthy. Anyone have any ideas what could be going on? Illness, injury, fluke incident argh!!