Against the pet wellness industrial complex.

Walk into any high-end pet boutique and count the jars. Turmeric chews for joint support. L-theanine soft-bakes for calming. Collagen bites for coat. Green-lipped mussel capsules for mobility. Milk thistle tinctures for liver function. Adaptogenic mushroom blends for "general wellbeing." The same health-food-store scripts, the same molecular promises, the same categories imported wholesale from human wellness. Priced, in most cases, at three to eight times the per-milligram cost of the human versions.

There are real veterinary supplements, backed by real clinical evidence, for real feline and canine conditions. They exist and they work. But they represent a small corner of what is now a multi-billion-dollar "pet wellness" market built largely on transplanted human wellness marketing applied to an animal that can't object.

This essay is about the difference. And about what it costs, over the decade of a pet's life, to confuse the two.

The borrowed script

The pet wellness category did not emerge from veterinary research. It emerged from the human wellness market reaching saturation — around 2015 to 2018, by most accounts — and pivoting to find new customers who couldn't push back. The copy is identical. Words like "adaptogenic," "bioavailable," "supports immune function," "gentle daily support." The formats are identical: jars, chews, tinctures, powders.

What changed was the target. A turmeric supplement sold to a thirty-five-year-old human needs to work, in some felt sense, or the human stops buying. A turmeric supplement sold to a dog does not need to work, because the dog is unable to report whether it feels any different, and the human buying it for the dog interprets the dog's normal day as evidence that the supplement is helping.

This is not to say that every pet supplement is a scam. It is to say that the financial incentive to produce effective pet supplements is markedly weaker than the incentive to produce effective human ones, because the feedback loop is broken at the point of use.

What we actually know works

A short list, because the evidence base is small.

Omega-3 supplementation for dogs with verified joint inflammation and for pets on diets low in oily fish. The evidence here is reasonably solid across veterinary literature, and the effect is real but modest.

Probiotics in specific contexts — during or after antibiotic courses, during diet transitions, during stress-related GI upset. Not as a daily baseline. The evidence for daily probiotic use in a healthy animal is thin.

Glucosamine and chondroitin for dogs with diagnosed osteoarthritis. Effects are slow (often three months to register) and modest in magnitude, but the research exists and the safety profile is clean.

Specific therapeutic diets prescribed by veterinarians for diagnosed conditions — renal diets for kidney disease, hydrolysed-protein diets for allergy, calorie-controlled formulas for obesity. These are not supplements, they are food formulated as medicine, and they work when the diagnosis is correct.

That is most of the list. The interventions with solid veterinary evidence are few, specific, and usually prescribed in response to a diagnosis rather than offered as daily enhancement.

What we mostly don't

A longer list, because this is where the money is.

Adaptogenic mushroom blends for pets. CBD without a specific indication. "Calming" chews for general behaviour (beyond short-term high-anxiety events). Coat supplements for pets already on complete commercial food. Joint supplements for young healthy animals as prevention. Most "immune support" products. Liver "detox" tinctures. Dental water additives for plaque prevention in an otherwise healthy mouth. Any product promising to reduce stress through a non-pharmaceutical oral daily supplement.

In each of these categories there may be individual products with better evidence than the average. But the category itself is speculative — which is to say, the default assumption should be "probably not doing much" rather than "probably doing something."

The specific red flag is the before-diagnosis supplement. Giving a dog a joint supplement because they are five years old is not the same as giving it because they've been diagnosed with early arthritis. The first is a marketing success. The second is medicine.

The trust trade

The pet wellness industry has a peculiar economic shape. It extracts money from owners who love their animals, for products whose efficacy is difficult to verify, by framing the alternative (not buying the product) as neglect. This is a potent and morally uncomfortable combination, and it is also extremely effective.

The correction is not cynicism. Real supplements exist. Real dietary interventions matter. A vet who recommends a specific supplement for a specific diagnosed issue is offering evidence-based advice. A boutique selling you ten jars for a healthy three-year-old is not.

The practical principle: default to food first, veterinary prescription second, and only reach for supplements when there's a named condition and a clinician who has endorsed the intervention. Be especially suspicious of anything that promises broad wellness without naming what it is addressing.

The animal who eats a complete commercial diet, gets enough exercise, sleeps without interruption, and sees a vet once a year is almost certainly getting more "wellness" from the free parts of that list than from anything in a jar. The jars are optional. Often they are less than optional.