A landmark decision handed down by the United States Court of Appeals for the Tenth Circuit in July 2026 has fundamentally altered the legal landscape for digital marketing and corporate communications. In the case of KetoNatural Pet Foods, Inc. v. Hill’s Pet Nutrition, Inc. (No. 24-3185), the court established a critical precedent: hyperlinks embedded within a company’s website that direct consumers to third-party content may, under specific circumstances, be legally categorized as the company’s own commercial speech. This ruling carries profound implications for the Lanham Act, as it suggests that businesses can be held liable for false or misleading advertising claims contained in external materials if those materials are intentionally integrated into their promotional strategy.
The Genesis of the Litigation
The conflict arose from a competitive dispute in the pet nutrition industry. KetoNatural Pet Foods, a challenger in the market, initiated litigation against Hill’s Pet Nutrition, alleging that the latter engaged in deceptive marketing practices. Central to the dispute was Hill’s use of hyperlinks on its digital properties. These links directed potential customers to third-party websites, including scientific studies and external articles that purportedly supported the health claims made about Hill’s products.
KetoNatural argued that by curating these links, Hill’s was effectively adopting the third-party claims as its own. The defense maintained that companies should not be held responsible for the veracity of independent third-party sources simply because they provided a navigational shortcut to those sources. However, the Tenth Circuit rejected this narrow view, determining that the intentionality of the link—when used to bolster a specific promotional narrative—serves to incorporate that external content into the company’s overall advertising message.
Chronology of the Legal Challenge
The legal trajectory of this case highlights the evolving nature of digital evidence in federal courtrooms:
- Initial Filing: KetoNatural Pet Foods filed suit alleging violations of the Lanham Act, specifically targeting the promotional pathways Hill’s Pet Nutrition employed on its digital platforms.
- District Court Proceedings: The lower court examined the extent to which a business exercises control over the digital "journey" of its consumers. The debate focused on whether "linking" constitutes "speaking."
- Tenth Circuit Review (2026): The appellate court focused on the "promotional purpose" test. The judges evaluated whether the hyperlinks were presented as mere references or as essential components of a persuasive sales funnel.
- The July 14, 2026 Ruling: The court concluded that when a company directs consumers to third-party content as part of a strategic marketing campaign, the linked material is not insulated from the scrutiny of the Lanham Act.
The Lanham Act and Commercial Speech
The Lanham Act (15 U.S.C. § 1125(a)) provides a federal cause of action for false advertising. Traditionally, this statute has focused on statements made directly by the advertiser. By expanding the scope of "commercial speech" to include hyperlinked content, the Tenth Circuit has significantly broadened the definition of what constitutes an "advertising claim."
Legal scholars observe that this ruling effectively ends the "passive conduit" defense. Previously, many corporations assumed that providing a link to an external study or article served as a citation, distancing them from the content of that source. The Tenth Circuit’s decision posits that if the hyperlink is used to validate a marketing claim, it is no longer an independent reference but a tactical extension of the company’s own promotional material.
Broader Industry Implications
This ruling sends a seismic shock through the digital marketing ecosystem. For decades, the practice of "content curation" and linking to white papers, third-party endorsements, and academic studies has been a staple of digital growth strategies.
Impact on Affiliate Marketing
Affiliate marketers often rely on external reviews and testimonials to drive conversions. If an affiliate program uses a brand’s specific creative assets to link to misleading third-party content, the brand may now find itself directly liable for the claims made in those external reviews. The decision forces brands to conduct rigorous "link auditing," ensuring that every site they direct traffic to meets the same compliance standards as their own homepage.
The Generative AI Factor
The ruling is particularly timely given the rise of generative AI. Many companies now use AI to scrape and summarize third-party content, often embedding links to the source material within the AI-generated output. The Tenth Circuit’s logic suggests that if an AI tool on a company’s website promotes a product using links to biased or inaccurate third-party data, the company cannot claim the AI was merely "providing information." Instead, the company may be held responsible for the resulting output as if it were their own internal marketing department.
Regulatory Scrutiny
The Federal Trade Commission (FTC) and state Attorneys General have long held that advertisers are responsible for the claims they make, including those that are implied. This decision provides these regulators with a clearer legal pathway to pursue enforcement actions. By defining hyperlinked content as commercial speech, the Tenth Circuit has effectively provided the FTC with a mandate to look beyond a company’s primary domain and examine the "entire digital ecosystem" of their promotional efforts.
Compliance Strategies for the Digital Age
Legal experts recommend that businesses adopt a proactive stance to mitigate liability in light of this ruling. The following strategies are increasingly vital:
- Comprehensive Link Audits: Marketing departments should conduct periodic reviews of all outbound hyperlinks. If a link directs to content that makes health, safety, or performance claims, that content must be vetted as if it were internal copy.
- Disclaimer Efficacy: While disclaimers are rarely a complete shield, companies are moving toward more robust disclosures regarding the nature of third-party content. However, the Tenth Circuit decision suggests that even a disclaimer may not be enough if the intent of the link is to deceive or substantiate a false claim.
- Third-Party Vetting: Brands should establish strict guidelines for external partners. If an influencer or a third-party site is part of a company’s broader promotional strategy, their content should be subject to the same compliance review processes as in-house advertising.
- Scientific Verification: If a company links to a scientific study to support a product claim, the company must ensure the study is not only accurate but also representative of the broader scientific consensus. Selective linking—where a company links only to studies that support their claim while ignoring contradictory data—may now be viewed as evidence of deceptive intent.
Future Legal Challenges
The KetoNatural decision is likely to trigger a wave of "linking litigation." Plaintiffs’ attorneys will undoubtedly look for instances where brands have used links to circumvent traditional advertising disclosure requirements. As the digital marketplace becomes more interconnected, the distinction between a company’s own words and the content it points to will continue to blur.
For practitioners like Richard B. Newman, an advertising practices attorney at Hinch Newman LLP, the ruling underscores the necessity of integrating legal counsel into the early stages of digital marketing development. "The takeaway is clear," notes industry counsel. "Courts are increasingly looking at the pathway of the consumer. If you intentionally guide a consumer down a specific path, you own the claims found along that path."
Conclusion: A New Standard for Accountability
The Tenth Circuit’s ruling serves as a warning that the internet does not provide a safe harbor for deceptive practices simply because the content resides on another server. The era of the "blind link" is over. Companies that wish to utilize external content as a pillar of their marketing strategy must now take full ownership of that content. Whether through influencer campaigns, affiliate partnerships, or AI-driven content generation, the mandate is clear: if you send them there, you are responsible for what they find.
As digital marketing continues to evolve, businesses must recognize that their web presence is no longer limited to their own domains, but encompasses the entire web of information they intentionally curate for their audience. Failure to recognize this paradigm shift may result in significant liability under the Lanham Act and increased scrutiny from federal regulators tasked with protecting the American consumer from false and misleading advertising.
