The Three Pet Supplement Claims That Get Brands Into the Most Trouble

​I review pet supplement claims for a living. What that means, practically speaking, is that I read a lot of marketing copy that would make an FDA compliance officer reach for a strong drink. And I say that without judgment, because most of the brands I work with are not trying to mislead anyone. They are trying to sell a product they believe in, and somewhere between the formulator's notes and the final draft, the language slipped.

And slips can land brands and their influencers in a lot of hot water.
​I know. I've seen it.

Pet supplement marketing occupies a regulatory gray zone that is narrower than most founders expect. There are a lot of players involved - more than in human supplements. The National Animal Supplement Council (NASC) provides a framework. The FDA regulates what separates a food claim from a drug claim. The FTC governs how you can advertise results. AAFCO provides language. And if your product lands on Amazon or Chewy, you have a fourth layer of platform-specific language restrictions sitting on top of all of that. Most brands are not managing all four at once because most do not realize they need to.
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Here are the three types of claims I see get brands into the most trouble.

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1. Structure/Function Language That Becomes a Disease Claim

This is the most common one, and it usually happens gradually.

A brand wants to highlight that their joint supplement helps dogs move better. The original copy said "supports healthy joint function," which is a defensible structure/function claim. Then someone in marketing asked for stronger language, the copywriter writes "helps dogs with arthritis feel more comfortable." That phrase makes it onto the website, the Amazon listing, and six months of email campaigns.

Here is the thing:

Arthritis is a disease. The moment your copy references a specific diagnosis, symptoms associated with that diagnosis, or outcomes associated with treating it, you have crossed from structure/function territory into drug claim territory. That distinction matters a LOT to the FDA. It matters to veterinarians evaluating whether to recommend your product. It matters to retail buyers deciding whether your SKU belongs on their shelf or their platform.

The fix is not complicated, but it has to be intentional. "Supports healthy joint mobility in adult dogs" stays on the right side of the line. "Helps dogs with arthritis" does not. 

Need help translating your current claims into compliant language? That is exactly what I do.

2. Efficacy Language That Has No Evidence Behind It

"Clinically proven." "Scientifically formulated." "Backed by research." These phrases have become so common in pet supplement marketing that they barely register anymore, which is part of the problem.

If you use any variation of "clinically proven," the FTC expects you to have clinical evidence. Not a study you read in a press release. Actual peer-reviewed research, ideally conducted on the specific formulation or ingredient at the dose in your product in the species the supplement is intended for. The bar is not as high as a pharmaceutical drug trial, but it is not zero. And if your claim implies more than your evidence can honestly support, that gap is exposure.

This does not mean you cannot talk about your ingredients. It means the language has to reflect what the research actually shows. "Omega-3 fatty acids have been studied for their role in supporting skin and coat health" is accurate. "Our formula is clinically proven to restore coat condition in 30 days" requires documentation. Brands get into trouble when those two types of claims get blended until no one can tell them apart.

I have seen this happen slowly, over months of content production. Each individual piece seems fine in isolation. Then you step back, and the brand has been implying clinical validation it does not have across hundreds of marketing touchpoints. That is the kind of cumulative pattern that draws scrutiny - regulatory problems, angry competitors, civil lawsuits, etc. 

3. Testimonial and Results Language That Implies Consistent Outcomes

Testimonials feel safe because they are technically true. A real customer said it. The dog really did seem better. The photos are real photos.

But the FTC does not evaluate testimonials based on whether the customer experience was genuine. It evaluates them based on whether the testimonial implies a result that is typical or representative for other buyers. If a customer writes "after two weeks on this supplement, my dog's allergies completely disappeared," and you publish that without a disclaimer that results vary, you have potentially made an advertising claim you cannot substantiate across your entire customer base.

The same logic applies to before-and-after imagery, dramatic transformation language, and any phrasing that implies a specific, reliable outcome. A single customer story is not clinical evidence. Treating it like it is, even subtly, is where FTC risk gets introduced without anyone realizing it.

Brands hire me to catch exactly this kind of thing before it goes live, when they are launching or scaling, or after an audit. Here is how the claims review process works.

Why This Keeps Happening (It Is Not What You Think)

None of this new. The NASC has published responsible supplement claim guidelines for years. The FDA has clear language on what separates a food claim from a drug claim. The FTC has been consistent on advertising substantiation. The information exists and is easily accessible.

What typically happens is that brands grow faster than their compliance infrastructure. Marketing teams produce content at scale. Copywriters are briefed on what a product does but not on where the regulatory lines are. No one in the room has the clinical training to feel the difference between "supports healthy mobility" and "helps arthritic dogs," so the stronger-sounding, more converting version wins.
By the time the issue surfaces, it is woven into a website, a paid ad account, an Amazon listing, and a year of social posts.
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The easiest time to catch this is before launch. The second-best time is right now, before the content compounds further.

A claims review is where that conversation starts.

Dr. Sarah Wooten, DVM, CVJ, is a licensed veterinarian and brand advisor who reviews pet supplement claims for regulatory compliance, biological supportability, and marketing risk. She has 20+ years of small-animal clinical practice and works with founders, marketing teams, and brand agencies in the pet industry.

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