Kutz, how old is your hen? That dropping is just mucus and blood which is definitely abnormal. How is she acting? Is she eating and drinking normally, or standing around hunched or puffed up? Several things can cause blood in stools such as capillary worms, coccidiosis, and enteritis. Has your vet check ed her stool for worms or cocci with a fecal float? They can also perform a gram stain for bacteria that cause enteritis. Capillary worms require more than a usual dose of wormer. Fenbendazole ( SafeGuard Liquid Goat Wormer or horse paste, or Panacur) 1/4 ml per pound of weight, given orally 5 days in a row will usually treat it. Many antibiotics can treat enteritis, and it is best to know what bacteria is causing it, to use the right one. Corid (amprollium) is good for coccidiosis. I would get a fecal float done to cut down on giving medicines randomly.