About and methodology
These are calculators, not advice. Every one of them shows the formula it used, cites where that formula came from, and states what it cannot tell you.
Where the numbers come from
Each calculator is built on formulas published by named veterinary sources — the 2021 AAHA nutrition guidelines, the Pet Nutrition Alliance, the MSD Veterinary Manual, and Bond Vet. The source is written next to the formula on the page, and listed again under Sources.
Nothing here is invented, and nothing is scraped from another calculator. Where two sources disagree, the page says so rather than silently picking one.
How the data is checked
The breed table is the only place this site makes claims about living animals rather than reproducing a published equation, so it is held to a higher standard. Every row links to the specific breed standard it came from, and a script fetches each cited page and compares the values before the site builds. If an entry has no source, the build fails. The test suite runs the same comparison.
What this site does not do
- No hands-on testing. We do not own these breeds, feed these foods, or measure these dogs. Nothing here is a product review, and we do not present ourselves as having tested anything. What we can do is read the primary sources carefully and show the arithmetic — so that is all we claim.
- No veterinary advice. No page here diagnoses or treats anything. The calculators cannot examine your animal, and several are explicit that a result below a threshold lowers risk without eliminating it.
- No product promotion. There are no affiliate links, no sponsored placements, and no named commercial services. If that changes, it will be labelled on the page rather than left for you to notice.
Corrections
If a number here is wrong, it is wrong in a way that matters — someone may feed an animal based on it. Corrections are the most useful thing you can send. Tell us the page, the figure, and the source you are working from, and we will either fix it or explain why we read the source differently.
Contact
Corrections, questions and source suggestions: corrections@nnpets.com. See also the privacy policy — the short version is that there is nothing to collect, because the calculators never send us anything.
Educational tools only. NNPets is not a veterinary service and cannot diagnose or treat any condition. For anything urgent, contact your veterinarian or an emergency animal clinic directly.