I'm looking at getting the Jarrow brand of probiotic which contains the saccharomyces. Is that the brand you are using?Because cats are not humans and because cats diets differ from humans--humans eat a lot more carbs--I feel more comfortable giving a pet formulated probiotic. But I gave two examples of quality probiotics vs Fortiflora which is more like a flavor enhancement than a probiotic. Saccharomyces boulardii is a special case. It is a yeast-based probiotic that you should absolutely use anytime your cats have diarrhea and especially any time they are prescribed antibiotics. Bacteria-based probiotics are killed by antibiotics. If you try to give bacteria-based probiotics alongside antibiotics, you are killing the probiotics and distracting the antibiotics with additional and unrelated targets. Using a yeast-based probiotic like s. boulardii will help you overcome both of these and keep the stools in good shape while the antibiotics are killing good microbiome strains with the bad. If your cat has been on a longer course of antibiotics or multiple courses, I definitely recommend the FMT pills from AnimalBiome to restore the microbiome more thoroughly than even pet formulated probiotics can accomplish.