http://www.fleetfarm.com/catalog/category/farm-livestock/animal-health/dr-naylor-blu-kote-topical-germicide-fungicide It's not so much the taste as it is the color, the blue doesn't look nearly as interesting as naked pink chicken skin.
As for the mean hen, they call it a "pecking order" for...
Huh. Her skin looks nice and healthy... the feather breakage on her back does look like rooster wear (but without spur damage) and you mentioned you don't have a rooster anyway. Any chance another, more dominant hen is mounting her and breaking feathers in the process? I would do two things-...