My friend's barn has a really lenient owner and a few too many horses than they can take proper care of. One of the horses apparently had a diarrhea problem in the past, and now there is hardened poop staining a good portion of his tail (which, have I mentioned, is white?). I sprayed his tail like crazy with the hose today, and washed it twice with a whitening shampoo, but it barely made a difference. Does anyone have any tips?
Sorry to bring up such a graphic topic, I know it's pretty gross, but I can't imagine this feels good to the horse, so I really want to help him!