Editorial · PetScored desk · June 10, 2026
Feeding trials vs “formulated to meet.”
Every complete dog food carries one line from AAFCO that says it is nutritionally adequate. That line comes in two versions, and the gap between them is one of the more meaningful things on the bag that almost no one reads.
Two ways to earn the same sentence
The AAFCO adequacy statement is the line that reads something like “[Product] is formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles for [life stage].” It is the manufacturer’s claim that the food is complete and balanced. There are two accepted ways to back it up, and the wording tells you which one a brand used.
The first is formulated to meet. The company calculates the recipe’s nutrient content from ingredient data, often confirmed with a laboratory analysis of the finished food, and shows it lands above the AAFCO minimums and below the maximums. It is faster and cheaper, it uses no animals, and it is by far the more common claim. It proves the nutrients are present in the bag.
The second is a feeding trial, signaled by wording like “Animal feeding tests using AAFCO procedures substantiate that [Product] provides complete and balanced nutrition.” Here the finished food was fed to real animals under a defined protocol: for adult maintenance, at least eight dogs eating only that food for 26 weeks, with body weight, blood work, and a veterinarian’s assessment confirming they stayed healthy. It is slower, more expensive, and much less common.
Why “present in the bag” is not the same as “works in the dog”
A spreadsheet can tell you a food contains enough of a nutrient. It cannot tell you the dog can absorb and use it. That gap is digestibility and bioavailability, and it is real: protein quality varies by source, minerals can bind each other and pass through unabsorbed, and a recipe that looks perfect on paper can still leave an animal short once digestion is involved. A feeding trial is the only one of the two methods that puts a live dog between the formula and the conclusion.
This is not a knock on formulated foods. Many excellent diets are formulated, and a well-run formulation by a qualified nutritionist is a genuine credential. The point is one of evidence strength: a feeding trial answers a question a calculation cannot, so it earns more credit.
How our rubric uses it
The AAFCO substantiation method feeds directly into our Nutrition Fit and Brand Trust scores. A feeding-trial statement earns more than a formulated one, alongside the related signal of whether the brand employs a qualified, named nutritionist and runs the kind of protocols that produce feeding trials in the first place. It is one of the concrete things underneath the vague phrase “vet-recommended”: the brands that actually run feeding trials tend to be the ones that can back the claim.
Two cautions keep it honest. First, watch the life-stage qualifier: a feeding trial run on adult dogs does not substantiate a puppy or all-life-stages claim. Second, a feeding trial is evidence of adequacy, not of superiority; it does not make a food “the best,” only better substantiated. As always, the score is our reading of the evidence the label provides, not veterinary advice.
- The PetScored desk. See where this sits in the dog food methodology, and what the other label panels prove in how to actually read a dog food label.