AnimalBiome S. boulardii + FOS Powder

This powder names a single organism, Saccharomyces boulardii CNCM I-3799, at 6.6 billion CFU per scoop according to the manufacturer's own product page. The prebiotic is GOFOS, a fructooligosaccharide sourced from non-GMO beet sugar, listed at 225 mg per scoop. The label doesn't say whether that 6.6 billion CFU figure is guaranteed through the expiration date or only measured at manufacture. Storage instructions are specific and unambiguous, though: keep it refrigerated and use within 60 days of opening. Printed label claims include reducing the frequency and severity of diarrhea, "fast-acting diarrhea relief," regulating stool frequency, and promoting healthy skin.

One inconsistency is worth flagging: a separate Amazon listing for this same product references "6.7 Billion CFU" in its title, which doesn't match the 6.6 billion figure on the manufacturer's own page. We used the manufacturer's number here since it's the more direct source, but the discrepancy itself is unresolved. Dosing splits into two tiers, Advanced Support for dogs with soft stools and Maintenance for normal stools, scaled by weight from a half scoop up to eight scoops daily at the extremes — though the material we found only gave the smallest and largest weight brackets, not every tier in between, so the full table has gaps. It's sold on Amazon under ASIN B0CVFKJC5X.