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Kirkland Signature: Facts, Recalls & Verified Foods
Kirkland Signature is made by Costco Wholesale Corporation — it scores green on 0 of 4 WSAVA-aligned criteria we track (2 red, 2 undisclosed), no FDA recalls on record, and 0 of the 3 Kirkland Signature foods we've verified carry an AAFCO feeding-trial statement.
THE FACTS, ONE SENTENCE — · 3 Kirkland Signature foods in our corpus
The scorecard
WSAVA-aligned criteria
The World Small Animal Veterinary Association's nutrition guidelines suggest four questions to ask any pet food maker before you buy. Most "best dog food" sites skip straight to ingredient vibes and star ratings — we publish the actual answers instead, each sourced, or marked honestly undisclosed when we can't confirm it.
0 of 4 criteria confirmed yes · 2 confirmed no · 2 undisclosed. Undisclosed is common, especially for smaller brands — it means we couldn't confirm an answer from a public source, not that the answer is unfavorable.
No named board-certified veterinary nutritionist or PhD nutritionist disclosed for Kirkland or its maker Diamond in fetched sources. Null.
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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').
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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.
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
These four checks come from WSAVA's global nutrition guidelines for evaluating a pet food manufacturer — not our own opinion score. Read our full methodology →
The company
Who makes Kirkland Signature
Ownership and history, each sourced independently — private-label and co-packed brands often hide the actual manufacturer behind the name on the bag.
Parent company
Costco Wholesale Corporation
source
Costco owns the Kirkland Signature label. The dog food is MANUFACTURED by Diamond Pet Foods, not Costco.
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Founded
Not publicly confirmed
source
Kirkland Signature is widely reported to have been introduced by Costco in 1995, but I could not fetch a source page containing that year (CNN/Costco/Taste of Home pages returned 451/403). Left null rather than cite an unfetched fact.
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Headquarters
Not publicly confirmed
source
Costco HQ is Issaquah, Washington, but that was not confirmed from a fetched source this session. Manufacturer Diamond Pet Foods is headquartered in Meta, Missouri (per diamondpetcompany.com/our-history). Left null for the label owner's HQ to avoid unverified assertion.
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The safety record
FDA recall history
Joined from the FDA's own Animal & Veterinary recall feed (2019–present) plus curated pre-2019 records — the same live-checked feed as our full recall database, filtered to Kirkland Signature.
Join of data/recalls.json (FDA Animal & Veterinary recall feed, 2019-present) + data/recalls_historical.json. This is NOT a complete lifetime recall history; recalls predating 2019 (or absent from the FDA datatable) are not represented unless curated in recalls_historical.json.
The corpus
What we've verified from Kirkland Signature's labels
Computed directly from the official-label data we've extracted for this brand — never estimated.
Foods verified
3
3 dog
Feeding-trial validated
0
of 3 (0%)
Formulated to meet
3
AAFCO paper calculation
Label transparency
62%
avg. fields disclosed
The foods
Foods from Kirkland Signature we've verified
Every one links to its own Verified Label — guaranteed analysis, AAFCO statement, and (where priced) cost per day.