Why is the protein minimum for cats so much higher than for dogs?

Cats are obligate carnivores with a metabolic requirement for animal-sourced protein that dogs — as omnivores — do not share. Cats cannot reduce protein catabolism when dietary protein is low, so they have a higher minimum requirement. AAFCO's nutrient profiles reflect this with a much higher protein floor for cats (65 g/1000 kcal) versus dogs (25 g/1000 kcal).

Does AAFCO set a minimum carbohydrate requirement?

No. AAFCO does not establish a minimum dietary carbohydrate requirement for dogs or cats. The carbohydrate field in this calculator is an optional estimation tool, not a regulated minimum — which is why it is presented as an estimate rather than a floor.

How accurate are the AAFCO minimums for my individual pet?

AAFCO profiles are designed for healthy adults at maintenance. They are reliable population-level minimums, but individual pets may need more protein (e.g. seniors preserving muscle) or have medical reasons to modify fat (e.g. pancreatitis-prone dogs). The calculator flags the minimum floor; a vet or veterinary nutritionist can advise on the right target for your specific animal.

Can I use this calculator to check a commercial pet food?

Commercial foods labelled "complete and balanced" have already been formulated to meet AAFCO profiles, so they will generally pass the minimum check. The calculator is most useful for evaluating home-prepared, raw, or supplemented diets that lack that label, or for understanding what a food's guaranteed analysis means in practical grams per day.

Should I consult a vet before changing my pet's diet based on this result?

Yes, particularly for significant dietary changes, home-prepared diets, or pets with health conditions. The macronutrient calculator addresses protein and fat floors only — a complete home diet also needs to meet vitamin, mineral, and essential fatty acid requirements that are beyond what this tool covers.

How the Daily Macronutrient Calculator Works | PetCalculator

The Daily Macronutrient Calculator translates your pet's daily calorie target into minimum protein and fat grams using AAFCO nutrient profiles. Here is how it works and how to read the result.