On the back of a dog food bag, usually in small type, sits the most informative sentence on the packaging. It is the nutritional adequacy statement, and almost nobody reads it.
Here is what it means and why it matters more than anything on the front.
The bodies that set the rules
AAFCO — the Association of American Feed Control Officials — is not a government agency and does not test or approve foods. It is a voluntary organisation of state and federal officials that publishes model regulations and nutrient profiles, which US states then adopt into law.
FEDIAF — the European Pet Food Industry Federation — publishes the equivalent nutritional guidelines used across Europe and the UK.
Both do the same essential job: define the minimum, and sometimes maximum, levels of each nutrient a dog food must contain to keep a dog healthy over the long term.
“Complete and balanced”
This phrase has a specific meaning, unlike most of the words on a pet food bag.
Complete means the food contains every nutrient a dog needs. Balanced means those nutrients are present in appropriate proportions relative to each other.
A food carrying this claim is intended as a dog’s sole diet. A food without it — treats, mixers, toppers — is complementary, and is not designed to be fed alone.
The two ways a food proves it
This is the crucial distinction, and it appears in the wording of the adequacy statement.
Formulation
*”Formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles for maintenance.”*
The manufacturer calculated the recipe, or had it laboratory analysed, and it meets the numbers on paper.
What that does not tell you is whether the dog can actually absorb the nutrients. Nutrient levels in a bowl and nutrient levels in a dog are different things: digestibility, ingredient interactions and processing all affect what gets used.
Feeding trials
*”Animal feeding tests using AAFCO procedures substantiate that this food provides complete and balanced nutrition for maintenance.”*
The food was fed to dogs over a defined period under a protocol, with blood values and body condition monitored.
This is the stronger claim. It is more expensive to produce and generally indicates a manufacturer investing in its formulation.
Life stage matters
The statement will also name a life stage:
- Growth — puppies
- Growth including large-size dogs — puppies expected to exceed around 70 lb (32 kg) as adults. This is a separate, stricter profile with controlled calcium, and it matters enormously for large-breed puppies.
- Maintenance — adult dogs
- All life stages — meets the growth profile, which is the most demanding. Suitable for puppies, but often richer than an inactive adult needs.
- Gestation and lactation
What the standards do not cover
This is where the limits of “AAFCO approved” — a phrase which does not really exist — become clear.
Ingredient quality. The profiles specify nutrients, not sources. A food can hit every number using ingredients of varying quality.
Digestibility. Not tested in the formulation route.
Individual suitability. A complete food can still be entirely wrong for a dog with kidney disease, a food allergy, or a sensitive stomach.
Long-term outcomes. Feeding trials run for a defined period, not for a lifetime.
Palatability. No standard makes a dog eat it.
The other things worth checking
Who formulates the food? The most useful single question. A company employing a board-certified veterinary nutritionist or a PhD in animal nutrition is in a different category from one that does not.
Where is it made? Companies that own their manufacturing plants have more control than those contracting it out.
Will they answer questions? A reputable manufacturer will tell you the calorie content, the full nutrient analysis on a dry matter or per-1000-kcal basis, and how they substantiate their claims. A company that will not is telling you something.
Do they conduct or publish research?
These questions come from the World Small Animal Veterinary Association’s guidelines on selecting pet foods, and they are a considerably better filter than ingredient lists.
Reading the rest of the label
Analytical constituents / guaranteed analysis gives protein, fat, fibre and moisture. Protein and fat are minimums; fibre and moisture are maximums. You cannot compare wet and dry directly without converting to a dry matter basis.
Ingredients are listed by weight before processing, which flatters fresh meat because most of the weight is water that is later removed. Watch for the same ingredient split into several entries.
Calorie content, usually as kcal per kilogram and per cup or can. This is what you actually need for portioning.
Feeding guidelines are population averages. Start there and adjust to your dog’s body condition.
IRIS USA Airtight Pet Food Storage Container
Keep the original bag inside the container. The bag carries the adequacy statement, batch code and best-before date — all of which you need if there is ever a recall, and all of which get thrown away when people decant.
Some links on this page are affiliate links. If you buy through them we may earn a small commission at no extra cost to you — it helps keep this site free. We only recommend products we would use with our own dogs.
Claims that carry no weight
- Natural, holistic, premium, gourmet, super-premium — no regulatory definition
- Human grade — rarely substantiated
- Grain free — a marketing position, not a health standard
- Ancestral, biologically appropriate — marketing
- No fillers — “filler” has no definition
Claims that do
- The nutritional adequacy statement, especially where it names feeding trials
- The correct life stage, especially for large-breed growth
- Prescription or veterinary therapeutic diets, which are formulated for specific diseases and are genuinely different products
- Calorie content, stated clearly
What to do with all this
Turn the bag over. Find the adequacy statement. Check it names the right life stage for your dog, and note whether it says “formulated” or “feeding tests”. Then find the calorie content and work out the actual portion.
Three pieces of information, thirty seconds, and you know more about the food than the entire front of the packet was going to tell you.
