"If the manufacturer cannot or will not provide any of this information, veterinarians and owners should be cautious about feeding that brand."
WSAVA Global Nutrition Committee, 2021
Does meeting WSAVA criteria mean a healthier dog?
It’s the best risk-reducing indicator an owner has, but it isn’t a certification, and no study shows it makes dogs live longer. Here’s exactly what it does and doesn’t tell you.
What the tier actually asks
The WSAVA tier comes down to one question: does the company do the things that make a sound food more likely? Does it keep a qualified nutritionist on staff, run real feeding trials, control its own manufacturing and quality testing, and tell you so? A brand that can answer yes to all four has done that work. If a brand won't answer, that silence is worth noting.
Why that's a rational bet
It's a rational bet because the failures those four safeguards screen for aren't hypothetical. Independent lab surveys keep turning up commercial foods that miss their own nutrient targets, recipes written without nutrition credentials are usually incomplete, and the field's worst diet scare in years, the grain-free DCM concern, clustered in brands that didn't meet the bar.
It helps to see how the safeguards stack up. "Formulated to meet AAFCO" only means the recipe looked right on paper. A feeding trial means real dogs actually ate it and got checked. Testing the finished product means someone confirmed what ended up in the bag, not just what’s in the recipe. A company that does all three has gone looking for problems the others never check for.
"This study highlights broad non-compliance of a range of popular pet foods sold in the UK with EU guidelines (94% and 61% of wet and dry foods, respectively). If fed exclusively and over an extended period, a number of these pet foods could impact the general health of companion animals."
Most popular UK foods (94% of wet, 61% of dry) fell short of EU nutrition guidelines, enough to affect health if fed as the only food long-term.
"Only 4 recipes written by board-certified veterinary nutritionists were available for evaluation; all 4 had nutrient profiles that were within the AAFCO-recommended ranges for an adult canine maintenance diet."
The only recipes that met the nutritional targets were the four written by board-certified nutritionists.
"Most diets assessed in this study were not compliant with AAFCO labeling regulations, and there were concerns regarding adequacy of AA content."
Most of these diets broke AAFCO labeling rules, and some looked short on amino acids.
"Twenty-three of 24 dogs diagnosed with taurine deficiency and dilated cardiomyopathy were fed diets that were either grain-free, legume-rich, or a combination of these factors. … None of these diets were feeding trial tested using [AAFCO] procedures."
Nearly every one of these heart-disease dogs ate a diet that had never been through an AAFCO feeding trial.
What it does not prove
This is where the marketing runs ahead of the evidence, so here are the limits.
- No longevity proof. You'll see this sold as "vets' #1 choice" and made
to sound like a longer, healthier life. We don't say that, because nothing shows it. No
trial or cohort has found that dogs on WSAVA-criteria brands outlive others, a clean
study would be almost impossible to run, and even top-tier brands have had serious
recalls. What the evidence backs is risk reduction, better odds of a sound food, not
extra years.
No randomized trial or cohort has shown that dogs fed WSAVA-compliant brands live longer or get sick less than dogs fed non-compliant brands, and such a study would be near-impossible to run cleanly.
Dog Food Wise synthesis of the literature
- Not a guarantee. The tier shifts the odds. It doesn't certify the bag
in front of you.
"FDA is alerting pet owners and veterinary professionals about the expanded recall of 86 total lots of 33 varieties (SKUs) of canned dog foods manufactured by Hill’s Pet Nutrition after receiving complaints that dogs eating the food experienced vitamin D toxicity."
Even Hill’s, a maker that meets the WSAVA bar, recalled dozens of products after dogs got vitamin D poisoning.
- Not a certification. "WSAVA approved" and "WSAVA certified" dog food don't exist. WSAVA certifies nothing and names no brands. It publishes a list of questions, and any brand selling a WSAVA seal is misusing the name.
- Not brand-neutral. The committee behind these criteria is funded by
Hill's, Purina, Royal Canin, and The Farmer's Dog, the same brands that tend to score
well on them. That doesn't make the questions wrong, they're sensible either way, but
it's why we treat WSAVA as a useful checklist and never as a neutral authority that has
"proven" anything.
The WSAVA Global Nutrition Committee states: "The Nutrition Committee is generously supported by our partners." Those partners, confirmed from the committee page's own logo images, are Purina, Hill's, Royal Canin, and The Farmer's Dog, the same brands that score well on the criteria.
Fairness to small makers
It cuts the other way too. The checklist can punish a small, careful maker that hires a board-certified nutritionist and tests its food but doesn't own a plant or fund published research. So instead of collapsing all of it into one "approved" stamp, we show each WSAVA question on its own, flag what a company won't disclose, and leave the weighing to you.
The bottom line
Meeting the WSAVA bar is about the most sensible risk-reducing choice you can make, because the failures it screens for are common and well documented. It is not a proven path to a longer life. Treat the tier for what it is: a diligence indicator that improves your odds, not a guarantee, a certification, or a promise of extra years.
How we grade the evidence
Not all studies carry the same weight. We grade each by design:
- Randomized trial. Dogs are assigned randomly to diets and compared. The strongest design for showing causation.
- Cohort or cross-sectional study. Dogs are observed, not assigned, so the studies can show a link but not a cause.
- Case series or survey. A set of real cases or reports, with no comparison group.
- Case report or opinion. A single account or an expert's view.
We also tag who funded each study. Funding does not make a finding wrong, but it tells you whose interpretation to scrutinize.