Coming back to say that I haven't seen any runny stool in a few days. Well, not from Harley anyway :) Kodak's stool is a bit runny, but that's from the grass. It will firm up. No dirty hocks, no big, flat patties. I may still see it here and there (he had a nasty one when we hauled him to the coach's for a lesson, but that's stress-induced), but at this point, I am inclined to think the pre and probiotics have done their job. I will finish the ones I have on hand, then take him off them for a while to see what happens. I will keep this "recipe" I concocted on file for when it comes back as needed. I have to say, I'm pretty pleased with the fact that I was finally able to get this under control.