Made by Diamond Pet Foods in US.
Average score: 56/100 across 7 pet food products.
Costco house brand. Co-manufactured by Diamond Pet Foods. Pricing-to-quality is unusually strong — same plants, fewer marketing dollars.
Kirkland Signature is manufactured by Diamond Pet Foods.
Kirkland Signature pet food is made in US.
Kirkland Signature is not on our WSAVA-aligned shortlist. That doesn't automatically mean the food is poor quality — many strong brands haven't pursued WSAVA recognition — but it means we lack independent confirmation of feeding-trial validation and on-staff veterinary nutritionist staffing.
No Kirkland Signature products match any FDA recall in our tracked feed. Two caveats worth stating plainly: our feed covers FDA recall notices from late 2025 onward, so a recall older than that would not appear here; and brand matching is deliberately conservative, so a recall naming a parent company or a co-manufacturer rather than Kirkland Signature itself may not be linked. For a definitive answer, check the FDA's own recall database.
Kirkland Signature averages 56/100 across 7 products in our catalog. Individual product scores combine ingredient quality, AAFCO compliance, and controversial-additive severity. See the methodology page for the full algorithm.
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