The Canine Ledger

What Goes in the Bowl: Commercial Food and Supplements, Without the Marketing

How to read a dog food label, what 'WSAVA-approved' really means, what the FDA found on grain-free food, and which joint supplements failed.

Written by thecanineledger

1. Start where you are

If you are…Start here
Standing in a shop, trying to read the bag§2: Reading a label
Told to buy a “WSAVA-approved” food§3: “WSAVA-approved”
Worried about grain-free food and heart disease§4: Grain-free and DCM
Buying a joint supplement for an older dog§5: Joint supplements
Wondering who pays for the research§6: How this section works

The World Small Animal Veterinary Association (WSAVA) warns that pet food labels “may also include marketing images and phrases that are designed to promote product sales rather than relay nutritional information” (WSAVA Global Nutrition Committee, Guidelines on Selecting Pet Foods, 2021).

While a food labelled “complete and balanced” is meant to meet a dog’s needs on its own, the words on the front of the bag tell you little about it. This section is about reading past them: the label, the endorsements, the controversies and the supplements.

This section is about commercial food. For cooking your own, see our Nutrition section. → Homemade Dog Food, Done Right: What the Evidence Actually Says

2. Reading a label

The most useful line on the bag is usually in small print on the back. The Association of American Feed Control Officials (AAFCO), which writes the model rules most US states use, calls the nutritional adequacy statement “perhaps the most important part of a label” (AAFCO, Reading Labels).

The product name matters too. In the US, “Beef Dog Food” must be mostly beef; “Beef Dinner” needs far less; “Dog Food With Beef” needs only 3%.

→ How to Read a Dog Food Label

3. “WSAVA-approved”

There is no such thing. WSAVA’s nutrition committee says plainly: “The GNC does not endorse, approve, recommend or support specific products or companies” (WSAVA, Nutrition Committee). Its guidelines are a list of questions to ask a manufacturer.

→ There Is No “WSAVA-Approved” Food

4. Grain-free and DCM

In 2018, the US Food and Drug Administration began investigating reports of dilated cardiomyopathy (DCM), a disease of the heart muscle, in dogs eating certain foods. Many were labelled “grain-free” and were high in peas, lentils or potatoes. By November 2022 it had received 1,382 reports. It has not found a cause, and says it has “no definitive information indicating that the diets are inherently unsafe”.

→ Grain-Free and DCM: What the FDA Found, and What Is Still Unknown

5. Joint supplements

Glucosamine and chondroitin are sold as joint supplements for dogs with arthritis. A 2022 meta-analysis found “a very marked non-effect of chondroitin-glucosamine nutraceuticals” for arthritis pain, and recommended they “should no longer be recommended” (Barbeau-Grégoire et al., Int J Mol Sci 2022). Omega-3s did better.

→ Glucosamine and Chondroitin: The Meta-Analysis Says No

6. How this section works

We disclose who pays. Much pet nutrition research and education is funded by pet food companies. WSAVA says its nutrition committee is “generously supported by our partners”. The authors of the 2022 supplement review declare past work for several pet food and animal health companies. Neither fact makes the work wrong, but you should know.

We don’t recommend brands or products, and this section earns nothing from them.

Our note: WSAVA’s own news posts name two supporters of the committee: Purina Institute (WSAVA, 16 December 2025) and The Farmer’s Dog (WSAVA, 29 July 2026). Its full partner list is in a video we couldn’t load without marketing cookies, so there may be others.

Our note: Label rules differ by country. AAFCO is US-only, Europe uses an industry code we haven’t read, and in Canada the CFIA says its “oversight of pet food is limited to ensuring compliance with import and export regulations”.

7. What we could not verify

Commonly saidWhat we found
“Buy a WSAVA-approved food”No such approval exists. WSAVA says so itself.
“Grain-free food causes heart disease”Not established. The FDA hasn’t found a cause; a 2026 study found no link with owner-reported heart diagnoses.
“Glucosamine helps arthritis”Not in a 2022 meta-analysis of nine trials.
“‘Premium’ and ‘holistic’ mean better food”Unregulated terms, WSAVA says, of little practical value.

Sources

Always confirm with your vet before acting on anything on this page.