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Diamond Maintenance

Dry food · adult dogs

A formulated-to-meet, chicken-first dry food that's denser than 23% (you feed fewer cups). Cost-per-day isn't available yet — this SKU isn't price-matched.

THE FACTS, ONE SENTENCE — data as JSON · reference dog 40 lb · updated 2026-07-12

$27.99 · 20 lb as of 2026-07-12 Check price →
Tell us about your dogevery number on this page updates live ↓
40 lb
For a 40-lb adult: 2¾ cupsper day not pricedper day —bag lasts passes 2 fit checks ↓

Joint, kidney, dental or heart concerns? Labels can't honestly answer those — that's vet territory. Why we don't checkmark them →

The evidence

The Verified Label

Every food on this site gets this exact panel — same fields, same order, sourced from the official label — so brands finally become comparable. Dots show where this food sits among all 494 dry foods we've verified.

Verified LabelThe standardized pet-food panel
VPFD № DIAMON
verified 2026-07-12

Composition — dry-matter basis

why dry matter
Moisture hides the real recipe: kibble is ~10% water, canned food ~78%. Removing water puts every food on one scale, so these are the only nutrition numbers that can be compared across foods. As-fed label values shown small.
Protein 24.4%label: 22% min lower than 90% of dry foods
Fat 13.3%label: 12% min lower than 82% of dry foods
Fiber 4.4%label: 4% max lower than 69% of dry foods
Est. carbohydrates ash not disclosed → 8% assumed, so this is an estimate ≈48.9%computed anchor available once more brands disclose ash
Calcium / Phosphorus extended guarantees: Ca 1% · P 0.8% · Ω-3 0.3% 1.25 : 1ratio, as fed within the AAFCO adult range (1:1 – 2:1)

Calories & cost — for your 40-lb adult dog

Calorie density 351 kcal/cup— kcal/kg lighter than 77% of dry foods (median 388) — you feed more cups
Daily serving2¾ cups
Cost per day—
20-lb bag lasts—

Cost per 1,000 kcal not available yet — this SKU isn't price-matched to a current retail listing. Serving math uses standard veterinary energy formulas — see the formula.

Standards & ingredients

AAFCO statement
what this means
Two kinds of AAFCO claims exist. Most foods are only "formulated to meet" nutrient profiles — a paper calculation. A smaller set carry the stronger claim: fed to real dogs in AAFCO-procedure trials ("Animal feeding tests using AAFCO procedures substantiate…").
 Formulated to meet · maintenance
First five ingredients (by pre-cooking weight)Chicken by-product meal (a source of glucosamine) · wheat flour · whole grain ground corn · rice bran · grain sorghum
Named animal protein first; named meals onlyYes
Legumes in first 10 (FDA DCM inquiry)None
BHA / BHT preservativesNone on label
Carrageenan (thickener)None
Ethoxyquin
why unknown
When a fish-meal supplier adds ethoxyquin, U.S. rules don't require it on the finished label — so no label can prove its absence for recipes containing fish meal. We report this as a gap rather than guessing.
 None — no fish meal in this recipe

Safety

FDA recalls — Diamond, since 2023None on record
ManufacturerNot confirmed from label
Label transparency 10 of 15 standard fields
Green = verified favorable · amber = gap in the record · red = verified unfavorable · gray = not disclosed / neutral fact.
Source: official label source (official)· price: Amazon, 2026-07-12 · anchors: 494 verified dry dog foods (360 priced) · how to read this label

The fit

For your dog, specifically

Checked for a 40-lb adult with a sensitive stomach — the same published criteria our finder uses. Change your dog above and these update.

✓
Validated for adult dogsAAFCO statement covers adult maintenance.
✓
Passes our sensitive-stomach checksNamed animal protein first, and no unnamed by-products in the ingredient list.
·
Contains chickenNot selected as a concern for your dog — shown here for reference.

The source material

The full ingredient list

Every flag on the Verified Label is computed from this list. Ingredients are ordered by pre-cooking weight — the first five carry the most information.

Chicken by-product meal (a source of glucosamine), wheat flour, whole grain ground corn, rice bran, grain sorghum, dried plain beet pulp, chicken fat (preserved with mixed tocopherols), egg product, dried yeast, natural flavor, flaxseed, calcium carbonate, potassium chloride, salt, DL-Methionine, choline chloride, dried Lactobacillus plantarum fermentation product, dried Bacillus subtilis fermentation product, dried Lactobacillus acidophilus fermentation product, dried Enterococcus faecium fermentation product, dried Bifidobacterium animalis fermentation product, vitamin E supplement, iron proteinate, zinc proteinate, copper proteinate, ferrous sulfate, zinc sulfate, manganese sulfate, copper sulfate, potassium iodide, thiamine mononitrate, manganese proteinate, vitamin A supplement, biotin, niacin, calcium pantothenate, sodium selenite, pyridoxine hydrochloride, vitamin B12 supplement, riboflavin, vitamin D3 supplement, folic acid

Nutritional twins

Priced close matches

This food has no verified price yet — these are the closest label matches that do.

Royal Canin Bulldog Adult Dry Dog Food
24.4% protein (DM)$2.05 / 1,000 kcal
Wellness Whitefish & Sweet Potato
24.4% protein (DM)$1.47 / 1,000 kcal
Blue Buffalo Life Protection Formula Large Breed Adult Dog Chicken and Brown Rice Recipe
24.4% protein (DM)$1.47 / 1,000 kcal

Label-composition matches only: same species, form, and growth stage; same primary protein where both are known; grain-free preserved; protein within 4 points and fat within 4 points, and estimated carbs within 8 points, on a dry-matter basis. Not a medical or quality recommendation.

The maker

Who makes this — and how they back it up

The four questions the WSAVA nutrition guidelines tell you to ask a pet-food company. Every answer is sourced or marked as an undisclosed gap — never guessed. This is the "is it made competently?" axis that star-rating sites skip.

Owns its manufacturing Owns its plants

Facilities are described as Diamond's own in Meta, Missouri (HQ); Gaston, South Carolina; Lathrop, California; Ripon, California; Dumas, Arkansas; Frontenac, Kansas; and Rushville, Indiana. Diamond Pet Foods is well known industry-wide as a company that owns and operates its own plants rather than co-packing.

source →
Employs a qualified nutritionist Undisclosed

Diamond states it uses an internal team spanning veterinary medicine and companion-animal nutrition disciplines, but does not name a specific individual or state a board certification for any staff member on this or other pages found. Cannot confirm true or false with a real source, so left null rather than guessed.

source →
AAFCO feeding trials Undisclosed

No feeding-trial AAFCO statement found on the 8 labels we’ve verified for this brand, and no company-wide claim was found either. Most pet foods are only "formulated to meet" AAFCO profiles (a paper calculation) rather than fed to real animals in trials — this is common, not necessarily a red flag.

Peer-reviewed research Unconfirmed

71 PubMed-indexed papers carry this brand's name in an author affiliation — but without a recognized pet-nutrition research arm we can't confirm these are the company's own studies rather than unrelated name matches (surnames, the taxonomic family "Canidae", institutions). We don't count it as confirmed research.

source →
Parent company Schell & Kampeter, Inc. (privately held, family-owned; Diamond Pet Foods is the trade name) ↗ Founded 1970 ↗ Headquarters / plant Meta, Missouri, USA ↗ FDA recalls on record 7 on record

Full company scorecard, sources, and every SKU we've verified for this brand: Diamond brand page →