My favorite hen Nelly passed a soft shell 2 days ago that was wrinkled and empty. (No egg inside) Today I found her in the nest box trying to lay, only she had bloody mucous coming out of her vent. Also there were two things that she passed that I don't know what they are. Her tail isn't down and she seemed ok the remainder of the evening, but I'm worried it could be serious! No vets in my area who see chickens.