Most of what’s printed on a bag of dog food is marketing. The World Small Animal Veterinary Association puts it plainly: unregulated terms like “holistic” or “premium” are “of little practical value for nutritional assessment.”

There’s no legal definition for either. Any manufacturer can print them on anything.

What follows is the framework veterinary nutritionists actually use — WSAVA’s Guidelines on Selecting Pet Foods, condensed into something you can run through in about five minutes. It won’t tell you which bag to buy. It will tell you which companies are worth buying from, which is the more useful question.

We are not veterinarians. Everything below is drawn from WSAVA, AAFCO and FDA guidance, linked so you can read the originals.

Four questions about the company

These are answered on the manufacturer’s website or by their customer service line. If you can’t get answers, that itself is the answer.

1. Do they employ a qualified nutritionist? WSAVA is specific about what counts: a PhD in Animal Nutrition, or board certification by the American College of Veterinary Nutrition (ACVN) or the European College of Veterinary Comparative Nutrition (ECVCN). Ask for the name and employment status too — a consultant has less influence than staff.

2. Who actually formulates the recipes? There’s a real difference between a diet developed by a trained formulator with an MS or PhD, and one developed by an owner, breeder or trainer. WSAVA notes that recipe formulation “requires knowledge of nutrition, raw materials, and processing not taught in veterinary school programs” — so even “formulated by a vet” isn’t automatically reassuring.

3. What is their quality control process? Adequate QC means ingredient validation, final diet nutrient analysis, toxicology, bacteriology, and packaging/shelf-life screening — before, during and after manufacturing. Ask whether nutrient levels are confirmed by chemical analysis of the finished product or merely calculated from a database. Those are not the same thing.

4. Do they publish research in peer-reviewed journals? No company is required to. But when they do, it signals investment in the science rather than the packaging.

The line that decides it: WSAVA’s own conclusion is that “if the manufacturer cannot or will not provide any of this information, veterinarians and owners should be cautious about feeding that brand.”

Four checks on the label

1. Find the Nutritional Adequacy Statement. This is the single most useful sentence on the bag, and it’s usually in small print near the ingredients. It tells you two things:

• Complete, or not? Foods labelled for “intermittent”, “short-term” or “complementary” feeding should make up 10% or less of the diet — or be fed only under veterinary supervision. Plenty of boutique foods are labelled this way and bought as if they weren’t.
• How was it established? Either the food was formulated to meet AAFCO profiles, or it passed AAFCO feeding trials. Feeding trials are the stronger evidence: the food was actually fed to dogs and they were monitored.

2. Check the life stage matches your dog. AAFCO sets separate profiles for growth, reproduction, and adult maintenance. Note the trap: “all life stages” means formulated for growth and reproduction — richer than a sedentary adult dog needs. It isn’t a neutral middle setting.

3. Find the calorie content. Calories per gram, cup or can. Only required on labels in the US; elsewhere you may need to ask. This matters more than it sounds — pet obesity is rising, and two foods with the same feeding instructions can differ substantially in energy density.

4. Check who actually makes it. “Made by” means the company manufactures it themselves. “Made for” or “Distributed by” means a third-party plant. Neither is disqualifying, but the first gives the brand direct control over the quality process you asked about in question three.

The grain-free question, answered honestly

This is where most articles pick a side. The evidence doesn’t support either one cleanly.

The FDA opened an investigation in 2018 into a possible link between certain diets and dilated cardiomyopathy (DCM), and it has since ended public case updates pending better science. What’s known now:

• No causal relationship has been established between grain-free diets and DCM.
• It does not appear to be caused by the absence of grain, nor by taurine deficiency — the original two theories.
• Peas and other pulses appear to be the ingredients most central to diet-associated cases, though the mechanism of heart injury is still unidentified.
• Researchers have found a possible mechanism: elevated urine biomarkers suggesting phospholipidosis, an abnormality in how a type of fat is metabolised.

The honest summary is that this looks multifactorial — genetics, formulation and nutrient balance interacting — and it remains unresolved. If your dog is on a grain-free diet heavy in pulses, that’s worth raising with your vet. It is not a reason to panic, and “grain-free” is not by itself a mark of quality or of danger.

What you can safely ignore

• “Holistic”, “premium”, “super-premium”, “human-grade” — none are legally defined for pet food
• Ingredient-list order alone — it’s by pre-cooking weight, so fresh meat outranks a more concentrated meal purely because of water content
• “No by-products” — by-products include organ meats, which are nutritionally dense
• Ancestral and wolf-diet marketing — dogs diverged from wolves in digestion, including starch metabolism

Frequently asked questions

What’s the single most useful thing to check? The Nutritional Adequacy Statement. It takes thirty seconds and tells you whether the food is complete, for which life stage, and whether that was established by feeding trials or by formulation.

Is expensive food better? Price tracks marketing and ingredient cost, not nutritional adequacy or quality control. Some of the companies that score best on WSAVA’s criteria are mid-priced and unglamorous, because they spend on nutritionists and testing rather than packaging.

Does my dog need grain-free food? Only if a vet has diagnosed a specific grain allergy, which is uncommon. True food allergies in dogs are more often to protein sources than grains.

How do I know if a food meets AAFCO standards? It will say so in the Nutritional Adequacy Statement. If that statement is absent, the food is not making the claim.

When should I switch foods? On veterinary advice, on a documented recall (how to check your pantry), or on a life-stage change. Not because of a new marketing claim. Transition over 7–10 days.

The bottom line

Run the eight checks once on whatever you currently feed. Most take a minute on the manufacturer’s website, and the label checks take thirty seconds in the aisle.

If a company answers all eight readily, you’re on solid ground regardless of what the front of the bag says. If they dodge, WSAVA’s guidance is to be cautious — and that’s a stronger signal than any review, including ours.

For specific products assessed against these criteria, see our dog food buyer’s guide, or the senior-specific guide if your dog is seven or older.

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General guidance, not veterinary advice. Diet changes for a dog with a diagnosed condition should be made with your vet.

Sources: WSAVA Global Nutrition Committee — Guidelines on Selecting Pet Foods (2021) · WSAVA Global Nutrition Guidelines · FDA — Investigation into potential link between certain diets and canine DCM · AVMA — FDA ends public DCM updates pending more science