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Kirkland Signature vs Nulo

Kirkland Signature is branded by Costco Wholesale Corporation and made by third-party co-packers, and Nulo is branded by Nulo, Inc. (owned by Apax Partners) and made by third-party co-packers, and both make food for cats and dogs. On KibbleLab, Kirkland Signature averages 8.6 out of 10 across its scored foods, compared with 8.4 for Nulo. Kirkland Signature's maker dates to 1983, while Nulo's launched in 2009.

Kirkland Signature and Nulo compared

Kirkland Signature Nulo
Manufacturer Costco Wholesale Corporation Nulo, Inc.
Parent company Independent Apax Partners
Founded 1983 2009
Headquarters Issaquah, Washington, USA Austin, Texas, USA
Manufacturing Whether a brand makes its own food in-house or has it produced by an outside contract manufacturer or co-packer.
Co-packer Co-packer
Made in USA United States
Manufacturing region Not listed Midwest and Southern regions
Products listed 17 289
Serves Cats & dogs Cats & dogs
Price tier A relative price guide, from $ (most affordable) to $$$$$ (most premium), based on the brand's typical retail cost.
$$ $$$$
WSAVA guidelines The World Small Animal Veterinary Association (WSAVA) publishes criteria for evaluating a manufacturer: qualified nutritionists on staff, feeding trials, and published research. It does not certify or endorse brands.
No No
PSC accredited The Pet Sustainability Coalition is a nonprofit that accredits pet companies on their environmental and social impact, through third-party verification. It reflects sustainability practices, not food quality.
No No
Score The average KibbleLab score across this brand's scored foods, on a 0 to 10 scale. Foods are scored on published veterinary science. How scoring works .
8.6 (avg of 17) 8.4 (avg of 289)
Recalls on record We track the FDA's animal food recall listings back to January 2019 and publish every pet food recall automatically. A filing that isn't pet food may not appear here.
None None
Where to buy
Amazon
Amazon

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Kirkland Signature vs Nulo: how they compare

Scores

Kirkland Signature scores higher on KibbleLab, averaging 8.6 out of 10 across 17 scored foods, compared with 8.4 across 289 for Nulo. Scores apply the same criteria-based rubric to every food, drawn from published veterinary science.

Who makes them

Kirkland Signature is a brand of Costco Wholesale Corporation, based in Issaquah, Washington, USA, founded in 1983. Its food is made by third-party co-packers in USA. Nulo is a brand of Nulo, Inc., owned by Apax Partners, based in Austin, Texas, USA, founded in 2009. Its food is made by third-party co-packers in United States.

Standards and range

Neither meets WSAVA's published manufacturer criteria. KibbleLab lists 17 Kirkland Signature foods and 289 Nulo foods.

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Common Questions

Which scores higher on KibbleLab, Kirkland Signature or Nulo?

Kirkland Signature scores higher: it averages 8.6 out of 10 across 17 scored foods, compared with 8.4 for Nulo. Scores reflect published veterinary science.

Who makes Kirkland Signature and Nulo?

Kirkland Signature is a brand of Costco Wholesale Corporation. Its food is made by third-party co-packers in USA. Nulo is a brand of Nulo, Inc., which is owned by Apax Partners. Its food is made by third-party co-packers in United States.

Which brand has more products on KibbleLab?

Nulo has 289 products in the KibbleLab database, compared with 17 for Kirkland Signature.

Where is each brand based?

Kirkland Signature is based in Issaquah, Washington, USA. Nulo is based in Austin, Texas, USA.

Have Kirkland Signature or Nulo been recalled?

Neither Kirkland Signature nor Nulo has a recall on record in the KibbleLab database. We track the FDA's animal food recall listings back to January 2019 and publish every pet food recall automatically. A filing that isn't pet food may not appear here.

See the full profiles: Kirkland Signature and Nulo .

More comparisons

KibbleLab provides informational content only. This is not veterinary advice. Always consult a qualified veterinarian before changing your pet's diet.

This is a neutral, factual comparison, not a ranking or an endorsement of either brand. KibbleLab may earn affiliate commissions through links. No one can pay for placement or a higher score.

Brand and manufacturer details are compiled from public sources and not independently verified; they may not reflect contract manufacturing or co-packing. Recall data is compiled from public FDA filings, and a filing may name the parent company rather than the brand. We track the FDA's animal food recall listings back to January 2019 and publish every pet food recall automatically. A filing that isn't pet food may not appear here.

KibbleLab scores and commentary are editorial opinions based on published data. Represent one of these brands? Request a correction. Anyone else can email us. See our Terms.