Key Takeaways The claim that “human probiotics work fine for dogs” is partially true with major caveats — most human strains have not been validated in canine hosts. Host specificity is a real microbiological phenomenon: bacterial strains isolated from dogs often behave differently in dogs than strains isolated from humans. Some general mechanisms (competitive exclusion,…

Key Takeaways The claim that postbiotics are “just marketing hype” contains a kernel of truth and a significant factual gap: postbiotics are not a rebranded probiotic, but their health claims outrun the canine trial base. Peer-reviewed evidence is strongest for oral-health endpoints. The 2025 canine dental plaque trial (PMID: 40509062) is the clearest case where…

“`html Key Takeaways The blanket claim that “all dog probiotics need refrigeration” is false. Stability depends on the format — live bacterial cultures, spores, and postbiotics each behave differently. Postbiotic supplements contain no live organisms. They are inherently shelf-stable from the day they’re manufactured until the printed expiration date. Live-culture products (certain soft chews, powders,…

“`html Disclosure: This article contains affiliate links. If you purchase a product through these links, we may earn a commission at no additional cost to you. This does not influence our editorial analysis or verdicts. Our fact-checking methodology is documented at the bottom of this page. Reviewed by Dr. Rachel Kim, DVM — Small animal…

Key Takeaways The NASC Quality Seal certifies GMP manufacturing compliance and adverse-event reporting — it does not certify therapeutic efficacy in dogs. A quality seal is the floor of evidence, not the ceiling. Product-level published trials in peer-reviewed journals sit above any certification mark. Plentum, a postbiotic + prebiotic oral-health formulation, has canine-specific clinical trials…