How Pet Food Is Formulated: What Companion Animal Nutritionists Actually Do
Every bag of kibble and can of wet food starts months before it reaches a shelf. Here’s an honest, inside look at how dog and cat food is really developed.
Visit AGeiger Pet NutritionEvery bag of kibble, can of wet food, pouch of freeze-dried meal, tub of raw diet, or container of fresh cooked food on a pet store shelf started somewhere far removed from that shelf. Long before packaging or marketing, there were months, sometimes years, of scientific planning, ingredient testing, nutrient calculations, and regulatory review.
Most pet owners never see any of that. They see a bag with a happy dog on the front and an ingredient list on the back. What they don’t see is the team behind it: nutritionists, food scientists, quality assurance staff, veterinarians, regulatory specialists, and manufacturing engineers, all working through a process most people have never heard of, called pet food formulation.
I’m a Companion Animal Nutritionist. My work sits at the intersection of animal nutrition science and commercial food production, helping pet food companies design and refine the recipes that eventually become the products on those shelves. This is meant to pull back the curtain a little, whether you’re a pet owner, a future nutritionist, or a small pet food brand wondering what a nutrition consultant actually does.
What Is Pet Food Formulation?
Formulation is the process of designing a recipe that checks every one of these boxes at once, not just one or two of them:
It is much more than mixing ingredients together. Every ingredient in a formula earns its place, whether that’s protein quality, a specific fatty acid, moisture, texture, or shelf stability. Change one ingredient and the whole nutritional profile shifts.
The Science Behind Formulating Pet Food
A nutritionist has to account for protein and amino acid quality, fat and essential fatty acids, carbohydrates, a full vitamin and mineral panel, fibre, moisture, energy density, digestibility, and bioavailability, all at the same time. Nutrient interactions matter just as much as individual targets: excess calcium can interfere with zinc and copper absorption, and too much phosphorus relative to calcium can affect bone development in growing animals. This is why an adjustment to one nutrient rarely happens in isolation.
Curious how nutrient values on a label can be misleading depending on moisture content? I break that down in as-fed versus dry matter comparisons, and you can run the numbers yourself with the dry matter calculator.
Following AAFCO Nutrient Profiles
Most commercial pet food in North America is formulated against AAFCO nutrient profiles, cross-checked with NRC research data. AAFCO breaks life stages into four categories:
Want the full breakdown of what AAFCO approval actually means (and doesn’t mean)? Read what AAFCO approval really means for dog and cat food.
Formulating Different Types of Pet Food
The manufacturing method shapes what’s nutritionally and functionally possible. Tap a format below to see how it changes the formulation approach.
Dry kibble goes through extrusion, high heat and pressure that cooks the starch and shapes the food. Formulas need to account for nutrient losses during processing and ingredients that hold up structurally through expansion. See how this looks in practice in how kibble is actually made.
Wet food typically goes through retort processing, a form of canning under heat and pressure, which affects texture, nutrient stability, and shelf life differently than extrusion. Moisture calculations shift substantially since wet food often sits at 70 to 80 percent moisture compared to 8 to 10 percent for kibble.
Fresh cooked food uses gentler cooking, preserving more nutrients but requiring tight control over moisture and safety since there’s no long ambient shelf margin. Raw diets skip cooking entirely, which raises the stakes on ingredient sourcing and pathogen control. Read more in raw feeding for dogs and raw food for cats.
Freeze-dried food removes moisture through sublimation rather than heat, preserving nutrients well but requiring formulation around rehydration and texture. Air-dried food uses low, slow heat, sitting between fresh and kibble in processing intensity. More detail in everything you need to know about freeze-dried dog food.
From Concept to Commercial Launch
Understanding the brand’s goals, target claims, and where there’s room to differentiate.
Building the recipe against nutrient targets, then refining it against budget.
Confirming suppliers and running small-scale test production.
Nutritional analysis, palatability testing, and shelf-life testing on the prototype.
Scaling to full production and building compliant packaging.
The finished product reaches the shelf, usually months after the first draft recipe.
Common Misconceptions About Pet Food Formulation
How Pet Owners & Pet Food Companies Benefit
For pet owners, professional formulation is what stands between a bag of ingredients and a diet that reliably supports long-term health, safety, and consistency. For Canadian pet food companies, particularly small and medium-sized brands without an in-house nutrition team, working with a consultant tends to mean faster development timelines, stronger regulatory compliance, fewer costly formulation errors, and real cost savings through smarter ingredient choices.
Curious what the role actually looks like day to day? I cover that in more depth in what does a pet nutritionist do.
Authoritative References
AAFCO Official Publication — aafco.org
National Research Council, Nutrient Requirements of Dogs and Cats — nap.edu
Canadian Food Inspection Agency (CFIA) — inspection.canada.ca
U.S. FDA Center for Veterinary Medicine — fda.gov
Health Canada, Veterinary Health Products — canada.ca
WSAVA Global Nutrition Guidelines — wsava.org
Formulating a new pet food, or auditing an existing one?
I work directly with Canadian pet food companies on formulation, reformulation, nutritional audits, and regulatory guidance, and with pet owners looking for a personalized nutrition plan.