Home / Dog food / Kirkland Signature / Kirkland Signature Nature's Domain Salmon Meal & Sweet Potato Formula Dog Food

Kirkland Signature Nature's Domain Salmon Meal & Sweet Potato Formula Dog Food package official product image via Amazon

Kirkland Signature · brand facts & recall history →

Kirkland Signature Nature's Domain Salmon Meal & Sweet Potato Formula Dog Food

Dry food · all dogs

A formulated-to-meet, salmon-first dry food that's cheaper per calorie than 87% of the dry foods we've priced — $1.19 a day for your 40-lb adult dog.

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

$68.60 · 35 lb $1.19/day 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: $1.19per day 57 daysbag 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 № KIRKLA
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 30%label: 27% min typical — the median dry food is 30%
Fat 16.7%label: 15% min typical — the median dry food is 16.7%
Fiber 4.4%label: 4% max lower than 69% of dry foods
Est. carbohydrates ash not disclosed → 8% assumed, so this is an estimate ≈40%computed anchor available once more brands disclose ash
Calcium / Phosphorus extended guarantees: DHA 0.05% · Ω-3 0.4% Not yet verifiedcalcium/phosphorus no ratio to anchor

Calories & cost — for your 40-lb adult dog

Calorie density 3590 kcal/kgper-serving value not disclosed no corpus anchor — value not yet verified
Daily serving—
Cost per day$1.19
35-lb bag lasts57 days

Cost per 1,000 kcal: $1.20 — cheaper than 87% of the 360 dry foods we've priced (median $1.93). 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 · all_life_stages
First five ingredients (by pre-cooking weight)Salmon · salmon meal · sweet potato · potato · pea
Named animal protein first; named meals onlyYes
Legumes in first 10 (FDA DCM inquiry)2 (pea, pea flour)
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.
 Can't be determined from label

Safety

FDA recalls — Kirkland Signature, 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 (secondary)· 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.
·
Chicken-free recipeNot selected for your dog — but relevant if chicken sensitivity ever comes up.

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.

Salmon, salmon meal, sweet potato, potato, pea, fish meal, canola oil (preserved with mixed tocopherols), pea flour, dried beet pulp, natural flavor, flaxseed, salmon oil, salt, potassium chloride, dl-methionine, dicalcium phosphate, choline chloride, taurine, blueberry, raspberry, tomato, dried chicory root, yucca schidigera extract, 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, ascorbic acid, vitamin A supplement, biotin, niacin, calcium pantothenate, sodium selenite, pyridoxine hydrochloride, vitamin B12 supplement, riboflavin, vitamin D3 supplement, folic acid

Wet ingredients like fresh salmon shrink once cooked — which is why named meals appearing high on the list matter: they keep meaningful animal protein after moisture is removed.

Nutritional twins

Cheaper close matches

Verified foods with a closely matching label at a meaningfully lower cost per 1,000 kcal.

Diamond Naturals All Life Stages Dog Chicken & Rice Formulasame maker family
28.9% protein (DM)$0.70 / 1,000 kcal42% less per 1,000 kcal
Diamond Naturals Adult Dog Beef Meal & Rice Formulasame maker family
27.8% protein (DM)$0.69 / 1,000 kcal43% less per 1,000 kcal
Diamond Naturals Skin & Coat All Life Stages Dog Salmon & Potato Formulasame maker family
27.8% protein (DM)$0.90 / 1,000 kcal25% less per 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 Co-packed

Private label: Costco owns the label but no plants; Kirkland Signature dog food is co-manufactured by Diamond Pet Foods (corroborated by dogfoodadvisor.com, which states 'Kirkland Signature pet food is made by Diamond Pet Foods').

source →
Employs a qualified nutritionist Undisclosed

No named board-certified veterinary nutritionist or PhD nutritionist disclosed for Kirkland or its maker Diamond in fetched sources. Null.

source →
AAFCO feeding trials Undisclosed

No feeding-trial AAFCO statement found on the 3 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 None found

A reproducible PubMed search (author-affiliation field, animal/pet-domain filtered) returns zero indexed papers for this brand name. Not proof no research exists — only that none is PubMed-indexed under this exact name.

source →
Parent company Costco Wholesale Corporation ↗ FDA recalls on record 1 on record

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