Key Takeaways “No fillers” has no regulatory definition under FDA rules for animal supplements. Manufacturers apply the phrase voluntarily, and the agency does not require them to disclose what they consider a filler. Labeling law treats the term “clean” the same way: it is marketing copy, not a regulated claim. AAFCO’s “natural” definition exists, but…

Key Takeaways We identified 14 dog supplement products displaying “clinically studied” or “clinically proven” language and traced every claim to its underlying citation. Citation quality falls into four distinct tiers: product-specific canine RCT (strongest), ingredient study with disclosed strain or compound, human-only study extrapolation, and citation of a general probiotic mechanism review without a specific…

Key Takeaways Between 2023 and 2026, dog supplement marketing pivoted from CFU-first claims toward milligram-metabolite and postbiotic claims. Live-culture stability data published in 2024-2025 created documented pressure on high-CFU soft chew formulations. Postbiotic ingredients appear on labels using weight-based dosing rather than CFU counts. Consumers reading “postbiotic” labels face a new challenge: no standardized CFU…

Key Takeaways The FTC’s 16 CFR Part 255 requires affiliate disclosures to appear “before or alongside” affiliate links — adjacent footers and buried disclosures do not satisfy the rule. Several “independent” canine supplement review sites display affiliate CTAs throughout their content while routing readers to the same handful of partner brands. Documents show disclosure language…

Key Takeaways A label-stated CFU count represents organisms present at the moment of manufacture, not necessarily at the point of sale or end of shelf life. No major soft chew brand currently publishes third-party verified CFU data measured at retail purchase date across the full shelf life. Moisture, heat, and oxygen exposure inherent to soft…

Key Takeaways “Veterinarian recommended” is almost never a clinical claim — it is a marketing phrase constructed from small, compensated panels with no published methodology. No major canine supplement brand discloses the panel size, selection criteria, compensation structure, or sampling frame behind a “vet recommended” label. The phrase is not regulated by the FDA or…

Key Takeaways “Made in USA” on a dog supplement label has no single legal definition for human or pet food — it sits under FTC’s unqualified and qualified origin claims guidance, while FDA regulates labeling separately. The FTC’s 2021 Final Rule withdrew its proposal for a 100% U.S.-origin standard. An unqualified “Made in USA” claim…

Key Takeaways Nine DTC canine supplement brands were tested across cancellation friction, autorenewal disclosure clarity, and hidden-fee transparency; friction scores ranged from 2/10 to 9/10. Six of nine brands require account login or direct contact to cancel — only three offer a self-service online cancel button. Autorenewal terms were buried in checkout footnotes on four…

Key Takeaways “Made in USA” is a FTC-regulated term: for products to carry the unqualified claim, “all or virtually all” of the manufacturing and significant components must originate in the U.S. — yet dog supplement labels rarely disclose the country of origin of active ingredients. Customs data, supplier filings, and label audits show that the…

Key Takeaways Affiliate disclosure compliance across canine health blogs remains inconsistent, with FTC endorsement guides requiring clear and conspicuous disclosure that many sites bury in footer text or omit entirely. Network analysis of “independent” review sites reveals common patterns: shared Amazon Associates IDs, identical product photography, and overlapping monetized link clusters that suggest undisclosed commercial…