How to compare pet food brands objectively: the WSAVA method
How to compare: Most brand comparisons start from the wrong question. Asking which dog or cat food brand is "the best" assumes a single ranking exists, when quality is always relative to one animal, its age, its health and its tolerance. A more useful question is narrower and answerable: when two brands sit side by side, which one can show more verifiable evidence behind it? This guide turns that question into a routine you can repeat at any shelf or web page. It rests on the assessment approach published by the World Small Animal Veterinary Association (WSAVA), a federation that brings together around 113 member associations representing more than 390,000 companion-animal veterinarians (WSAVA, 2026). The WSAVA certifies no food and awards no label: "WSAVA-approved" does not exist (WSAVA, 2021). What it offers instead is a set of factual questions, and that is exactly what makes a comparison neutral. Petipedia quotes no prices and holds no affiliate relationship, so what follows is about method, not products.
Last updated :General documentary information. For an individual animal, a veterinarian's advice takes precedence over any online content.
Why "the best brand" is the wrong starting point
Answer capsule: No brand is best in the abstract. A food is judged by how well it fits a specific animal, so the honest comparison is recipe against recipe on verifiable facts, not brand against brand on reputation.
The idea of a universally best brand has no nutritional basis. The best food for a senior cat with reduced kidney function is not the best for a large-breed puppy still growing, because their needs diverge on protein density, mineral balance and energy (FEDIAF, 2024). A brand can excel for one profile and be unsuitable for another, which is why a single league table cannot describe quality. The detail that trips up many shoppers is that two foods both meeting a recognised nutrient profile are not therefore equivalent: they have cleared the same minimum floor, nothing more.
This is also why brands segment their own ranges into puppy, senior, neutered [US: spayed or neutered] and light lines. That segmentation is not empty marketing; it reflects genuinely different needs that no single formula can cover. The practical consequence is that you never really compare "the brand" as a whole. You compare two named recipes, and you judge the company behind each on the same evidence.
What the WSAVA method actually measures
Answer capsule: The method scores a brand on five checkable facts: a named qualified nutritionist, the type of feeding trials, ownership and control of the factory, public recall history, and willingness to share full nutritional data.
The WSAVA nutrition committee publishes Global Nutrition Guidelines and a short tool, "Selecting a pet food for your pet", designed to help an owner interrogate a manufacturer rather than trust its advertising (WSAVA, 2021). The strength of the approach is that every item is verifiable in principle. You are not asked to weigh how "natural" or "biologically appropriate" a food sounds; you are asked who formulated it, what evidence supports it, who makes it, what its safety record is, and how openly the company answers questions.
Each of the five facts maps to a real risk. A named, credentialled formulator addresses the risk of an unbalanced recipe. Feeding trials address the gap between a formula that looks complete on paper and one tested in living animals. Factory ownership addresses traceability and control of production lots. Recall history is an objective safety signal. Transparency tests whether the company will stand behind its numbers. Together they replace a marketing impression with a small dossier of facts.
The five facts, one at a time
Answer capsule: Ask each question in writing, record the answer with its source and date, and treat an evasive reply as data in itself rather than a neutral blank.
The first fact is the formulator. A serious manufacturer can name a person with a relevant qualification: a doctorate-level animal nutritionist or a board-certified specialist (in the United States the American College of Veterinary Nutrition, ACVN; in Europe the European College of Veterinary and Comparative Nutrition, ECVCN) (WSAVA, 2021). "Formulated by experts" with no name is weaker than a named credential.
The second fact is the type of feeding trial. There is a real difference between a food "formulated to meet" a profile and one tested through an animal feeding trial. Under AAFCO protocols, a feeding trial for adult maintenance runs for a minimum of 26 weeks (AAFCO, 2024). A trial is a higher level of evidence than calculation alone, though calculation against a profile is still legitimate.
The third fact is the factory. Owning the plant is not an automatic guarantee, but it changes lot control and traceability, and a brand that uses a contract manufacturer (a co-packer) can still impose a strict specification (WSAVA, 2021). What matters is that the company will tell you who makes the food and where.
The fourth fact is recall history. Public recall databases, such as the US Food and Drug Administration's recalls and withdrawals list, give an objective record (FDA, 2024). A single isolated recall is not a trend, and a brand that recalled promptly may be acting responsibly; the absence of any record on a very new brand simply means there is little history to read.
The fifth fact is transparency. Beyond the mandatory analytical figures, will the company supply, on request, the precise metabolisable energy and the full nutrient analysis (WSAVA, 2021)? The quality of a customer-service reply varies enormously between brands, and that variation is itself a comparison point.
Building a side-by-side comparison table
Answer capsule: Use one table with identical columns for both brands, enter only verifiable facts, and avoid any value judgement so the grid speaks for itself.
The discipline of the method is in the layout. You draw a table whose rows are the five facts and whose columns are the two brands, then you fill each cell with a fact, not an opinion. The template below is the heart of the routine.
| Verifiable fact (WSAVA) | Brand A | Brand B | What a strong answer looks like |
|---|---|---|---|
| Named qualified nutritionist (ACVN/ECVCN) | yes / no / name | yes / no / name | a named person with a credential |
| Feeding trial type (AAFCO/FEDIAF) | formulated / animal trial | formulated / animal trial | an animal feeding trial of 26+ weeks (AAFCO, 2024) |
| Factory ownership and control | own plant / co-packer | own plant / co-packer | a named site and lot controls |
| Public recall history | checked, dated | checked, dated | a checked record with the source (FDA, 2024) |
| Full nutritional data on request | yes / no | yes / no | metabolisable energy and full analysis supplied |
Once the grid is filled, the comparison is largely done. If one brand names its formulator, runs animal trials and shares full data, while the other answers vaguely on every line, the difference is visible without anyone declaring a winner. The table is then a basis for a conversation with your veterinarian, who adds the one thing it cannot hold: the response of your individual animal.
Where regulatory profiles fit, and where they do not
Answer capsule: Compliance with a FEDIAF or AAFCO profile is a pass or fail floor for nutritional balance, not a quality score, so two compliant foods are equally "complete" but not equally good for a given animal.
A complete food must respect a reference nutrient profile: FEDIAF in Europe, AAFCO in the United States (FEDIAF, 2024; AAFCO, 2024). It is tempting to read compliance as a mark of quality, but it is a minimum of balance, not a ranking. This is the most common misreading of a label. Confirming that both foods are complete and balanced for the right species and life stage is a necessary first filter; it cannot, by itself, separate two compliant products.
After the floor is cleared, the WSAVA facts and the animal's needs do the separating. Energy density, protein source, digestibility and fit to the animal's life stage are where two compliant recipes genuinely diverge. The profile tells you a food will not leave an animal deficient; it does not tell you the food is the better of two.
Why online "top 10" rankings need caution
Answer capsule: Many ranking sites are funded by affiliation, earning a commission on sales, which can tilt a "top" list toward the best-paying product rather than the best-fitting one; treat any ranking as a lead, not a verdict.
Affiliate funding pays a site a commission on the sales its links generate. The content can still be useful, but the financial incentive can shape which products are promoted, and in several jurisdictions disclosure of that link is required; in the United States the Federal Trade Commission sets out endorsement rules (FTC, Endorsement Guides). A product with no affiliate programme may simply be absent from a list, with no explanation. The counter-intuitive part is that cross-checking several comparators offers little protection if they all share the same commercial incentives.
A few signals justify caution: no stated methodology, repeated sales superlatives such as "the best" or "a must-have", an ever-present buy button, and no verifiable criteria. A trustworthy comparator does the opposite, publishing its method, its criteria and any commercial links in a "how we assess" section. Because pet food is a Your Money or Your Life topic, a ranking shaped by commission can steer a sick animal toward an unsuitable food, so the safe habit is to treat every "top" list as a starting lead and decide with your veterinarian from non-commercial sources.
The recommendation: a routine you can reuse
Answer capsule: Filter both foods for profile compliance, fill the five-fact table from the brands' own answers, then let your veterinarian weigh the result against your animal; the brand that shows more evidence wins the comparison, but the animal decides the choice.
The reusable routine has three moves. First, confirm both foods are complete and balanced for the right species and life stage, which clears or fails them on the nutritional floor (FEDIAF, 2024). Second, fill the five-fact table from what each company will actually tell you, in writing, recording each answer with its source and date. Third, take the completed grid to your veterinarian and read it against your specific animal, because a feeding trial on a population cannot predict one individual's tolerance.
No step asks you to crown a best brand, and that is the point. The method gives you a defensible, repeatable comparison built on facts anyone can check, and it leaves the final decision where it belongs, with the animal in front of you and the professional who examines it.
Related reading (compare food)
- FAQ: Is there a single best brand of dog or cat food?
- FAQ: How do you choose between two premium brands that look identical on paper?
- FAQ: Should you trust the "best brand" rankings you find online?
- Glossary: WSAVA
- Glossary: feeding trial
- Hub: Brands and neutral comparisons
Sources
- WSAVA, Global Nutrition Guidelines and "Selecting a pet food for your pet" (2021): https://wsava.org/global-guidelines/global-nutrition-guidelines/
- WSAVA, About Us, membership figures consulted 2026 (around 113 associations, 390,000+ veterinarians): https://wsava.org/about-us/
- AAFCO, Understanding Pet Food, feeding trial protocols (2024): https://www.aafco.org/
- FEDIAF, Nutritional Guidelines (2024): https://europeanpetfood.org/self-regulation/nutritional-guidelines/
- US FDA, Recalls & Withdrawals, Animal & Veterinary (2024): https://www.fda.gov/animal-veterinary/safety-health/recalls-withdrawals
- US FTC, Endorsement Guides: https://www.ftc.gov/business-guidance/resources/ftcs-endorsement-guides-what-people-are-asking
This guide is general information on a Your Money or Your Life topic and does not replace a veterinary consultation for an individual animal.