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Diamond vs Kirkland Signature

Diamond vs. Kirkland Signature

In this comparison article for Diamond vs Kirkland Signature, we'll highlight the key differences between these two pet food brands. To properly compare Diamond and Kirkland Signature, we'll use up-to-date nutritional and price information.

There are many factors to consider when choosing the best pet food brand for your pet. Factors such as ingredient quality, guaranteed analysis, product safety, brand history, and cost are among the most important factors to consider.

Throughout this Kirkland Signature vs Diamond comparison, we've utilized average data to make general comparisons. If you'd like to see individual product reviews, visit our Diamond Review Page or Kirkland Signature Review Page.

Guaranteed Analysis: Kirkland Signature vs. Diamond

According to AAFCO, all pet food labels must provide a guaranteed analysis of nutrient content. The analysis must provide guaranteed minimum percentages of crude protein and crude fat, and maximum percentages of crude fiber and moisture.

All percentages used in this comparison are averages reported on a dry matter basis.

Diamond Dog Food vs. Kirkland Signature Dog Food

Dry Dog Food Diamond Kirkland Signature
Crude Protein 27.6% 27.5%
Crude Fat 16.7% 15.3%
Crude Fiber 4.5% 5.4%
Wet/Canned Dog Food Diamond Kirkland Signature
Crude Protein 43.9% 44.4%
Crude Fat 25.8% 27.8%
Crude Fiber 4.5% 5.6%

Crude Protein Comparison For Dog Food

Protein is an extremely important part of your dog's diet. Without sufficient protein, dogs can develop a wide-range of serious health problems.

Kirkland Signature and Diamond both provide roughly the same amount of crude protein. With regards to wet dog food, Kirkland Signature and Diamond also provide roughly the same amount of crude protein.


Crude Fat Comparison For Dog Food

Fats are an absolutely vital component of a balanced canine diet. Not only do fats provide energy, but they also serve important roles in the normal development and function of your dog's body. For example, fats help dogs produce prostaglandins, which reduce inflammation among many other significant functions.

There is a relatively insignificant difference between the crude fat content of the two brands. For wet dog foods, Kirkland Signature typically provides a little more fat (about 2.02% more).


Both brands provide roughly the same amount of crude fiber. With regards to wet dog food, Kirkland Signature and Diamond also provide roughly the same amount of crude fiber.

Diamond Cat Food vs. Kirkland Signature Cat Food

Dry Cat Food Diamond Kirkland Signature
Crude Protein 36.7% 34.8%
Crude Fat 17.6% 15.9%
Crude Fiber 5.2% 5.9%

Crude Protein Comparison For Cat Food

Protein is an extremely important part of your cat's diet. Without sufficient protein, cats can develop a wide-range of serious health problems.

As you can see, Kirkland Signature and Diamond guarantee a similar amount of crude protein.


Crude Fat Comparison For Cat Food

There are many ways in which dietary fat contributes to the overall health of our feline friends. Here is a short list of benefits provided by fats (not exhaustive):

  • Fats help with the digestion and absorption of fat-soluble vitamins
  • Reduce inflammation associated with arthritis
  • Slow the growth of yeast infections
  • Prevent or reduce the likelihood of certain heart problems.
  • Aid in the development of the retina and visual cortex.

Diamond Pet Food Ingredients vs. Kirkland Signature Pet Food Ingredients

Diamond and Kirkland Signature both use the following controversial ingredients in many of their products:

Tomato Pomace
Powdered Cellulose
Canola Oil (Preserved With Mixed Tocopherols)

Here are some of the controversial ingredients used only by Diamond.

Meat Meal
White Rice
Ground Corn
Brewers Rice
Beef By-Products
Corn Gluten Meal
Chicken By-Product Meal
Ground Whole Grain Corn
Poultry By-Product Meal

Here are some of the controversial ingredients used only by Kirkland Signature.

Canola Oil
Pea Protein
Organic Canola Meal
Organic Pea Protein
Organic Canola Oil (Preserved With Mixed Tocopherols)

We believe that certain pet food ingredients are linked to adverse health affects; these ingredients are classified as harmful.

Here are some of the harmful ingredients used only by Diamond.

Menadione Sodium Bisulfite

Product Safety: Recall History of Diamond & Kirkland Signature?

Diamond has been recalled once.

  • March 10, 2013: low level of thiamine (Vitamin B1)

According to our records, Kirkland Signature has never been recalled.


Disclosure: PawDiet has an affiliate relationship with stores featured (or linked-to) in this article. We are compensated for referring customers. Thank you for shopping with our retail partners!

Where To Buy Diamond Pet Foods

You can purchase Diamond pet foods from the following stores:


32 Recipes In-Stock Today

34 Recipes In-Stock Today

35 Recipes In-Stock Today

Where To Buy Kirkland Signature Pet Foods

You can purchase Kirkland Signature pet food products from these retailers:


Type Of Pet Foods Available

Product Diamond Kirkland Signature
Dry Dog Food 27 Recipes 12 Recipes
Wet Dog Food 3 Recipes 1 Recipes
Dog Treats 6 Treats
Dry Cat Food 6 Recipes 3 Recipes
Wet Cat Food 3 Recipes
Cat Treats

Compare Pet Food Prices Across Multiple Pet Stores