Who manufactures Kirkland Signature dog food?

Kirkland Signature dog food has been manufactured by Diamond Pet Foods, a US-based company that also makes Diamond Naturals, Taste of the Wild, and several other brands. This has been confirmed in multiple FDA recall notices and Diamond company filings.

What is the difference between Kirkland and Nature's Domain?

Both are Costco-exclusive Kirkland Signature lines. The standard Kirkland Signature line uses chicken and rice as primary ingredients. Nature's Domain is the grain-free, premium-tier line with options like salmon-and-sweet-potato or turkey-and-pea. Nature's Domain typically costs slightly more per pound.

Has Kirkland dog food had recalls?

Yes, like many large-volume brands. The most notable was a 2012 salmonella recall affecting multiple Diamond-manufactured brands, including some Kirkland Signature products. Since then, Diamond has expanded quality controls. Always check the current FDA pet food recall list before purchasing.

Reviews

Kirkland Signature Dog Food Review 2026: Is Costco's Brand Worth It?

Published: May 13, 2026

Costco's Kirkland Signature dog food has built one of the most loyal followings in the US pet food market — it's the brand many owners point to when they want premium-feeling food without the premium price tag. But who actually makes it? What's in the bag? And is it really comparable to brands costing twice as much? This review breaks down the facts.

The Basics: Who Actually Makes Kirkland Dog Food?

Kirkland Signature is Costco's private label, but Costco doesn't operate pet food plants. Kirkland Signature dog food has been manufactured by Diamond Pet Foods, a US company that also produces Diamond Naturals, Taste of the Wild, and Solid Gold. This is well-documented through FDA filings and the company's manufacturing facility records.

Knowing the manufacturer matters because quality control, recall history, and feeding trial practices all happen at the manufacturer level — not at Costco's headquarters.

Kirkland Dog Food Lineup at a Glance

Product	Primary Protein	Grain Status	Best For
Kirkland Chicken & Rice	Chicken	Contains grains	Adult maintenance, budget-conscious
Kirkland Mature	Chicken	Contains grains	Senior dogs 7+
Kirkland Puppy	Chicken	Contains grains	Puppies, growth stage
Nature's Domain Salmon & Sweet Potato	Salmon	Grain-free	Sensitive stomachs, fish-based diets
Nature's Domain Turkey & Pea	Turkey	Grain-free	Poultry alternative, novel protein

Note on grain-free: The FDA has investigated a potential link between grain-free diets and dilated cardiomyopathy (DCM). If your dog doesn't have a diagnosed grain allergy, current veterinary nutrition consensus favors complete and balanced foods from established manufacturers over grain-free for grain-free's sake. Discuss with your vet.

Ingredients: What's Actually in the Bag?

Looking at the Kirkland Signature Chicken & Rice formula as an example, the first five ingredients are typically chicken, chicken meal, whole grain brown rice, white rice, and chicken fat. Compared to brands at a similar price point (e.g., Purina Dog Chow, Pedigree), Kirkland's first-five list trends higher on named animal proteins and lower on cereal byproducts.

Compared to premium brands like Hill's Science Diet or Royal Canin, Kirkland uses fewer specialized ingredients (no specific cognitive blend, no breed-targeted kibble shapes), but the core nutritional profile is competitive.

All formulas carry an AAFCO nutritional adequacy statement for the appropriate life stage.

Pros and Cons

Pros

• Strong value: typically 30–50% cheaper per pound than premium brands
• AAFCO-compliant for the labeled life stage
• Real meat as the first ingredient in most formulas
• Multiple life-stage options (puppy, adult, mature)
• Wide US availability through Costco's 600+ warehouses
• Bulk-size bags reduce per-pound cost further

Cons / Caveats

• Requires a Costco membership ($65/year as of 2026)
• Diamond Pet Foods has a recall history (most notably 2012 salmonella)
• No published feeding trials specific to the Kirkland line
• Less variety than specialty brands (no prescription diets, no breed-targeted formulas)
• Some grain-free formulas may not be appropriate per current FDA DCM guidance

Who Should Buy It?

Good Fit

• Owners feeding 1+ adult dogs without specific medical conditions
• Multi-dog households wanting bulk-size value
• Existing Costco members wanting one-stop shopping
• Anyone whose vet has not specifically recommended a prescription or specialty diet

Look Elsewhere If

• Your dog has been prescribed a therapeutic diet (Hill's Prescription Diet, Royal Canin Veterinary)
• Your dog has a confirmed food allergy that hasn't been ruled out for Kirkland's protein sources
• You want documented breed-specific or life-stage research backing (Hill's, Purina Pro Plan, Royal Canin all publish more)
• You don't have or want a Costco membership

Frequently Asked Questions

Who makes Kirkland Signature dog food?

Diamond Pet Foods, a US-based manufacturer that also produces Diamond Naturals, Taste of the Wild, and Solid Gold. Confirmed via FDA filings and recall documentation.

What's the difference between Kirkland Signature and Nature's Domain?

Both are Costco's house brands. Standard Kirkland Signature uses chicken & rice and contains grains. Nature's Domain is the grain-free premium-tier line with options like salmon-and-sweet-potato. Nature's Domain typically costs a bit more per pound.

Is Kirkland dog food AAFCO approved?

Yes. All Kirkland Signature and Nature's Domain dog food formulas carry an AAFCO nutritional adequacy statement for the specified life stage.

Has Kirkland dog food been recalled?

Yes — most notably during the 2012 Diamond Pet Foods salmonella recall, which affected several Diamond-manufactured brands including some Kirkland products. Always check the current FDA pet food recall list before purchasing.

Editorial note: This article is independent editorial content and does not include affiliate links. Brand and manufacturer relationships are based on publicly available FDA filings and company documentation. Always discuss diet changes with your veterinarian, especially for dogs with health conditions.

← Back to articles