A landmark decision handed down by the United States Court of Appeals for the Tenth Circuit on July 14, 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 significant legal precedent: businesses may be held legally responsible under the Lanham Act for the content of third-party websites if they intentionally direct consumers to that content through hyperlinks as part of a promotional campaign.
This ruling clarifies that the traditional "hands-off" approach—whereby companies assumed immunity for external content they merely linked to—is no longer a viable defense when that linking is done with the intent to incorporate the destination material into a broader commercial message. The decision forces a re-evaluation of how corporations, advertising agencies, and digital marketers curate the digital pathways they provide to consumers.
The Origins of the Dispute
The litigation between KetoNatural Pet Foods and Hill’s Pet Nutrition centers on the complexities of modern pet food marketing. As consumers increasingly rely on online research to make purchasing decisions, brands have turned to external scientific studies, expert endorsements, and third-party blogs to substantiate their claims.
In this instance, the dispute arose over the specific manner in which Hill’s Pet Nutrition utilized hyperlinks on its digital platforms. KetoNatural alleged that by embedding specific links to third-party materials, Hill’s was effectively adopting those external claims as its own. When those claims were purportedly false or misleading, KetoNatural argued, they constituted a violation of the Lanham Act, which prohibits false advertising and unfair competition.
The district court’s initial handling of the case eventually paved the way for the Tenth Circuit to examine whether the act of linking itself constitutes an adoption of speech. The appellate court’s ruling serves as a warning that digital "signposting" is not a neutral act; it is a deliberate navigation of the consumer journey that carries with it the weight of legal liability.
The Tenth Circuit’s Legal Reasoning
The core of the Tenth Circuit’s holding rests on the concept of "intentional incorporation." The court opined that when a company curates a digital experience—directing a user from a landing page to a specific white paper, a third-party review, or an influencer’s endorsement—it is actively shaping the commercial narrative.
Under the Lanham Act, "commercial speech" is subject to strict scrutiny regarding its truthfulness. The court’s decision asserts that if a hyperlink serves as an integral component of a promotional message, the destination content loses its character as independent speech and becomes, for all practical purposes, an extension of the company’s own advertising.
This interpretation closes a long-standing loophole that many digital marketers previously exploited. By effectively outsourcing controversial or unsubstantiated claims to third-party domains, companies previously felt insulated from the burden of proof required for direct claims. The Tenth Circuit has now signaled that courts will look at the "pathway" of the marketing funnel rather than isolating the individual source of a claim.
Chronology of the Case and Precedent
While the July 2026 ruling is the definitive word from the Tenth Circuit, the legal journey toward this conclusion has been building for several years.
- Early 2024: The initial filing of KetoNatural Pet Foods, Inc. v. Hill’s Pet Nutrition, Inc. occurs, alleging deceptive marketing practices that leveraged third-party content.
- Late 2024–2025: Discovery phases reveal the extent of the hyperlinking strategy, with experts debating the "intent" behind the digital architecture of the defendant’s website.
- Early 2026: Lower court rulings highlight the ambiguity in existing Lanham Act interpretations regarding hyperlinked material, setting the stage for appellate review.
- July 14, 2026: The Tenth Circuit delivers its final opinion, establishing the principle that intent-driven hyperlinking creates a nexus of liability.
This timeline reflects a broader shift in judicial thinking, moving away from a literalist interpretation of the internet toward a functionalist one—where the technology of the link is viewed as a communicative tool rather than a mere navigational convenience.
Implications for Regulatory Agencies
Legal experts suggest that the Federal Trade Commission (FTC) and state Attorneys General are likely to view this ruling as a powerful tool in their regulatory arsenal. The FTC has long maintained that disclosures must be "clear and conspicuous," and that advertisers are responsible for the claims they make, whether directly or through influencers.
With the Tenth Circuit’s blessing, regulators now have a clearer mandate to investigate the "entirety" of a marketing campaign. If a company links to a third-party site that makes dubious health claims, that link could be construed as an endorsement or a reiteration of those claims. This will likely lead to an increase in Civil Investigative Demands (CIDs) targeting the digital infrastructure of companies, forcing them to audit not only their own websites but every destination they link to in their promotional materials.
The Intersection of AI and Liability
The ruling is particularly timely given the rapid integration of Generative AI (GenAI) into digital marketing. AI agents often browse the web to provide summaries or recommendations, creating dynamic hyperlinks on the fly. If an AI tool embedded in a brand’s website generates a link to a false or defamatory source, the company may now be held accountable under the same logic of "intentional incorporation."
As businesses automate more of their customer interaction, the risk of "accidental" or "automated" liability increases. The Tenth Circuit’s decision implies that the responsibility to monitor the digital environment extends to the algorithms that curate content for the end-user.
Strategic Considerations for Digital Marketers
For marketing professionals, this decision necessitates a fundamental change in content strategy. The following practices are now considered high-risk:
- Blind Linking: Linking to third-party studies or articles without verifying the underlying methodology or claims.
- Implicit Endorsements: Using hyperlinks to "fill in the blanks" of a marketing claim (e.g., stating "Our product is better" and linking to a third-party source that is not, in fact, an objective study).
- Influencer Ecosystems: Relying on influencers to drive traffic to third-party sites that make prohibited health or efficacy claims.
Compliance teams should now implement a "link vetting" process. This includes verifying the credibility of any destination domain, ensuring that linked content does not contain prohibited claims, and adding clear disclaimers that the company does not necessarily endorse or adopt the content of third-party websites.
Conclusion: A New Era of Digital Accountability
The decision in KetoNatural Pet Foods, Inc. v. Hill’s Pet Nutrition, Inc. represents a maturing of internet law. By acknowledging that digital links are not just technical connections but communicative acts, the Tenth Circuit has brought the Lanham Act into the modern digital age.
Companies can no longer hide behind the "third-party" label when they are the architects of the traffic flow. The burden of proof for the veracity of marketing claims now follows the consumer wherever they are led, whether it is a proprietary landing page or a remote, hyperlinked blog. As this precedent sets in, businesses must prioritize transparency and accuracy at every step of the digital journey, ensuring that their promotional ecosystems remain as compliant as the messages they draft themselves.
Richard B. Newman, an advertising practices attorney at Hinch Newman LLP, emphasizes that this ruling should serve as a wake-up call for any organization that uses external content as a pillar of its marketing strategy. For entities operating in highly regulated sectors—such as supplements, pet food, pharmaceuticals, and consumer technology—the audit of external links is no longer optional; it is a critical component of risk management.
This report is provided for informational purposes only and does not constitute legal advice. Organizations concerned about their digital marketing practices should consult with experienced counsel to ensure compliance with evolving federal and state advertising standards.
