This morning I noticed that one of our hens, Orloff, had poop stuck to the feathers under her tail/vent area. Her vent doesn't seem to be blocked, and it does not bother her (I will say, however, that I have not been keeping very close track of her). She made what seemed to me a rather large excrement earlier today, but that is all that I have seen. Does anyone have recommendations on how to approach this problem? I have attached several pictures below from this morning (it has dried significantly since then).