Evidence & day-cost method

Methodology

Updated 2026-11-05 (America/Los_Angeles) · Hybrid gaps method added · Research-based

Research-based guide. Full SKU ledgers and lived-order evidence are still incomplete; the gaps are documented rather than hidden.

What this hub optimizes for

We help US dog households estimate recurring day cost under explicit calorie, portion, shipping, tax, and promo assumptions, and understand delivery and pause/skip/cancel wording before they subscribe. We do not publish “healthiest” star rankings, disease-cure claims, or fake veterinary endorsements.

Four evidence pillars

PillarWhat we use it forWhat we refuse to do
1. Community / forum signalsSurface purchase frictions (bills, shipping delays, cancel confusion)Collage forums into a whole page or treat upvotes as causation
2. Manufacturer / official docsLabels, kcal, shipping & subscription policies, recallsTreat marketing as peer review or medical endorsement
3. Authority / standardsFDA complete-and-balanced concepts; AAFCO label-reading frameworks; WSAVA selection questions as a checklistImply FDA/AAFCO/WSAVA “certified this brand”
4. Scientific literatureNarrow claims with design, species, and funding disclosedExtrapolate one study into longevity or cure claims for all fresh food

Public tags we aim to use: verified label/terms, cross-supported, single-source user report, conflict, pending.

Required cross-checks

  1. Forum “$X/day” ↔ same SKU, calories, first vs recurring, shipping, date.
  2. Marketing “complete and balanced” ↔ nutritional adequacy statement + life stage on label.
  3. Forum efficacy anecdotes ↔ literature/FDA boundary; never rewrite as proven therapy.
  4. Brand study claims ↔ primary paper when available.
  5. Cold-chain complaints ↔ brand handling text + FDA safe-handling principles — not photo “still safe” advice.

Day-cost formulas (visible)

Let K = user daily kcal target, E = kcal/g from the same SKU, W = net box grams, P food net USD, S shipping/cold-chain, T tax, D first-order food discount, optional waste fraction w.

  • E = kcal/kg ÷ 1000 or kcal/pack ÷ g/pack
  • g/day = K ÷ E
  • N = W × (1 − w) × E ÷ K (coverage days)
  • Recurring day cost (P + S + T) ÷ N; first-order (P − D + S + T) ÷ N

D does not silently discount shipping or tax. Missing calories or unknown fees block a precise-looking answer in the calculator. We never invent kcal or fill unknown shipping with another brand’s average.

Plan arithmetic demo (not a brand quote): W=4000 g, E=1.6 kcal/g, P=$80, S=$10, T=$0, D=$16. At K=800: ~500 g/day, 8 days, ~$11.25 recurring / ~$9.25 first-order day cost.

Lived vs research-shaped

Steps we have not personally done (buy, receive, open, feed, cancel in-account) are labeled 资料型 / research-based guide / not lived. Official process pages can still be summarized with access dates. Author credentials and any future professional review will be listed honestly on About—we do not invent a vet reviewer.

Lived-shaped gaps such as ZIP checkout quotes and cancel/refund outcomes may be filled later by the author’s own orders or by structured volunteer reports collected via Contribute. Until an author-lived step exists, volunteer material is labeled as such (Single-source user report / Cross-supported)—never rewritten as “we tested this.”

How we evaluate gaps (A + B → C)

For missing per-SKU kcal / net weight / live price, ZIP shipping or tax at checkout, and pause / skip / cancel / refund outcomes, we use a hybrid stack (ziming ops decision 2026-11-05 PT):

LayerEN / CN tagsRole
A. Official baselineVerified label / terms · 已核对标签/条款Manufacturer labels, checkout/policy pages, authority definitions (FDA/AAFCO frameworks—not brand certification)
B. Structured user reportsSingle-source user report · 单源用户报告Volunteer intake fields (ZIP3/state only; redacted evidence). Schema: site evidence template
C. Our evaluationCross-supported · Conflict · Pending · 交叉支持 / 存在冲突 / 待核实Editorial synthesis only when the bar is met; otherwise Our take withheld

Default bar before “Our take”: roughly n ≥ 3 recent, same SKU (or clearly equivalent pack) and same order type; price/cancel/refund prefer last 90 days; conflicts are labeled, not averaged away. We never invent numbers, never treat one Reddit post as a rate, never collage forums into a whole page, and never present user reports as the author’s lived test.

Page pattern for gaps: Official baseline → User reports (count + invite) → Our take. Volunteer form: /contribute/. Related review example: JustFoodForDogs evaluation pending blocks.

Revision triggers

  • Price, promo cap, free-shipping threshold, or cancel cutoff changes on an official page.
  • Label reformulation (new kcal or net weight → new ledger row, never overwrite history).
  • Recall or material FDA handling guidance updates.

Related: Contribute (opening soon) · Affiliate disclosure · Cost-per-day guide · JustFoodForDogs review.