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Kirkland Dog Food

Kirkland Dog Food is produced by Diamond Pet Foods and is the exclusive store brand of Costco. The Kirkland Signature house brand was first introduced back in 1995 by the company and includes a variety of products and consumables for both humans and pets.

In 2006, Diamond Pet Foods voluntarily recalled many of their pet products after cats and dogs became ill and died in 22 states after ingesting aflatoxin, a naturally occurring toxin that comes from the fungus formed on crops like corn but one that can cause liver damage. However, the Kirkland Signature product line of dog foods by Diamond was not affected by the recall.

Kirkland Signature Dog Food Varieties at a Glance

Kirkland Signature Dog Foods are available in different formulas with prices varying depending on the size of the bag as well as the store's location. However, 40-pound bags are generally less than $25.

Here is a list of the most popular variety and the first five ingredients of each:

  • Kirkland Signature Range Chicken, Rice & Vegetable Adult
  • Includes: Chicken, chicken meal, whole grain brown rice, cracked pearl barley, chicken fat.

  • Kirkland Signature Range Lamb & Rice Adult
  • Includes: Lamb, lamb meal, whole grain brown rice, rice flour, white rice.

  • Kirkland Signature Range Super Premium Puppy Chicken, Rice & Vegetable
  • Includes: Chicken, chicken meal, whole grain brown rice, cracked pearl barley, egg product.

Other varieties of Kirkland dog foods include their Signature Mature and Weight Maintenance formulas.


Based on consumer reviews, perhaps the best aspects of this particular dog food are first, their reasonable prices, which are considerably less than premium and mid-grade brands, and second, the fact that no varieties of Kirkland dog food products contain corn, a common filler found in many brands of commercial foods for dogs.

However, despite the lack of corn in any of their dog food products, critics point out the use of another questionable filler, beet pulp, which is a byproduct made from the dry residue of sugar beets. The controversy behind beet pulp as a filler for dog food derives from the fact that while manufacturers claim it's a good source of fiber, others say that it is merely used to slow down the metabolism of animal fats, which leads to added stress on both the liver and kidneys. Beet pulp has also been linked to both allergies and ear infections and those against its usage in dog foods note that other vegetables and fruits could be used as sources of fiber. Yet others still point out that beet pulp contains "good" bacteria which promotes a healthy digestive tract.

Also, although barley and brown rice, two common ingredients in Kirkland Signature foods for dogs, aren't totally digestible by dogs, they are a far better source of plant proteins than corn or wheat, which should be reserved for animals like cows, goats, or sheep.

Of course, if you have specific questions about whether or not a particular type of dog food or the ingredients in a certain brand is healthy for your pet, always consult with your veterinarian and get a second or even third opinion if necessary.

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