Hello! I know this isn't a great topic, but I've been noticing my hen has a messy butt feathers around her vent, and I've been seeing "loose" feces in the pine shavings below the roost in the morning. Her back is bare from my rooster mating with her, but that is her only other issue. She also has a touch of frostbite on her comb My chickens haven't been wormed, and they are confined to a dirt run at the moment (she is used to free ranging). I feed them Nutrena layer feed. Is this a well balanced feed? Or are there better ones out there? What could be the cause of her diarrhea?