My dog has recurring UTIs and has to be on antibiotics often, from which she gets GI issues all the time, so we tried this Saccharomyces Boulardii. It is THE ONLY probiotic which has helped her diarrhea and digestive upsets (we've tried them all!). She used to have issues at least a few times a week before we started this probiotic, plus dietary recommendations from the founder Yogit. She's doing so well now, we can't thank Buho Boost enough.