Editorial · PetScored desk · June 10, 2026
Feeding trials vs “formulated to meet.”
Flip the bag over and you will find one line from AAFCO, the group that sets pet food nutrient standards, saying the food is nutritionally adequate. What you may not notice is that the line comes in two versions. The gap between them is one of the more meaningful things on the bag, and almost no one reads it. Once you know the two phrasings, you can spot the difference in about five seconds.
Two ways to earn the same sentence
The line you are looking for reads something like “[Product] is formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles for [life stage].” That is the maker’s claim that the food is complete and balanced. Here is the part worth knowing: there are two accepted ways to back that claim up, and the wording on your bag tells you which one the 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 what you will see most. What it tells you is that the nutrients are present in the bag.
The second is a feeding trial, and you will know it by wording like “Animal feeding tests using AAFCO procedures substantiate that [Product] provides complete and balanced nutrition.” This time 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 rarer to find on a shelf.
Why “present in the bag” is not the same as “works in your dog”
A spreadsheet can tell you a food contains enough of a nutrient. It cannot tell you your dog can absorb and use it, and that gap is the whole reason this distinction matters. 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.
None of this is a knock on formulated foods. Plenty of excellent diets are formulated, and a well-run formulation by a qualified nutritionist is a genuine credential, so do not read a formulated bag as a red flag. The point is simply about strength of evidence: a feeding trial answers a question a calculation cannot, so it earns more credit from us.
What this changes in our scores
When you see our Nutrition Fit and Brand Trust scores, this is one of the things feeding them. 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. Think of it as one of the concrete things hiding 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 are worth carrying with you. First, check the life-stage qualifier: a feeding trial run on adult dogs does not substantiate a puppy or all-life-stages claim, so the words have to match the dog you are feeding. Second, a feeding trial is evidence of adequacy, not of superiority; it does not make a food the best one for your dog, only better substantiated. As always, the score is our reading of the evidence the label provides, not veterinary advice.
- The PetScored desk. If you want to go deeper, see where this sits in the dog food methodology, and what the other panels on the bag prove in how to actually read a dog food label.