The past two days, one of my hens has been standing in the back corner of my run and won't walk around. She's kinda hunched down and looks uncomfortable. This morning, she had a long strand of droppings and straw hanging from her vent. We pulled it and a whole bunch of it was clogging her up. We think this is the problem, but she still is standing by herself looking in pain. She ate and drank a little, but still the same. I'm worried for her. Does anyone know what might be wrong with her????