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Authority vs Kirkland Signature

Authority vs. Kirkland Signature

In this comparison article for Authority vs Kirkland Signature, we'll highlight the key differences between these two pet food brands. To properly compare Authority 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 Authority comparison, we've utilized average data to make general comparisons. If you'd like to see individual product reviews, visit our Authority Review Page or Kirkland Signature Review Page.

Guaranteed Analysis: Kirkland Signature vs. Authority

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.

Authority Dog Food vs. Kirkland Signature Dog Food

Dry Dog Food Authority Kirkland Signature
Crude Protein 28.9% 27.5%
Crude Fat 14.5% 15.3%
Crude Fiber 4.8% 5.4%
Wet/Canned Dog Food Authority Kirkland Signature
Crude Protein 41.4% 44.4%
Crude Fat 22.8% 27.8%
Crude Fiber 8.3% 5.6%

Crude Protein Comparison For Dog Food

Dogs require twenty-two amino acids to sustain life. Twelve of these amino acids are synthesized naturally, the remaining ten are consumed. Protein is the nutrient which provides some or all of these ten essential amino acids.

There is a relatively insignificant difference between the crude protein content of the two brands. For wet dog foods, Kirkland Signature typically provides a little more protein (about 3.07% more).


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.

Both brands provide roughly the same amount of crude fat. For wet dog foods, Kirkland Signature provides more fat (about 4.98% more).


As you can see, Authority and Kirkland Signature guarantee a similar amount of crude fiber. For wet dog foods, Authority typically provides a little more fiber (about 2.74% more).

Authority Cat Food vs. Kirkland Signature Cat Food

Dry Cat Food Authority Kirkland Signature
Crude Protein 36.9% 34.8%
Crude Fat 15.4% 15.9%
Crude Fiber 6.0% 5.9%

Crude Protein Comparison For Cat Food

Cats require twenty-two amino acids to sustain life. Eleven of these amino acids are synthesized naturally, the remaining eleven are consumed. Protein is the nutrient which provides some or all of these eleven essential amino acids.

There is a small difference between the protein content of Authority and Kirkland Signature. We can see that Authority guarantees about 2.10% more protein than Kirkland Signature.


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.

Authority and Kirkland Signature both provide roughly the same amount of crude fat.


Authority Pet Food Ingredients vs. Kirkland Signature Pet Food Ingredients

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

Canola Oil
Pea Protein
Powdered Cellulose
Canola Oil (Preserved With Mixed Tocopherols)

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

Corn
Wheat
Caramel
Beet Pulp
Corn Syrup
Ground Corn
Animal Liver
Brewers Rice
Ground Wheat
Poultry Meal
Wheat Gluten
Caramel Color
Garlic Powder
Vegetable Oil
Corn Gluten Meal
Refined Corn Syrup
Dried Garlic Powder
Dried Tomato Pomace
Soybean Protein Concentrate

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

Tomato Pomace
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 Authority.

Corn Oil
Propylene Glycol
Menadione Sodium Bisulfite Complex

Product Safety: Recall History of Authority & Kirkland Signature?

According to our records, neither brand has issued any product recalls. Therefore, consumers have no reason to question the safety of Authority or Kirkland Signature pet food products.


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 Authority Pet Foods

You can purchase Authority pet foods from the following stores:


Where To Buy Kirkland Signature Pet Foods

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


Type Of Pet Foods Available

Product Authority Kirkland Signature
Dry Dog Food 33 Recipes 12 Recipes
Wet Dog Food 19 Recipes 1 Recipes
Dog Treats 6 Treats
Dry Cat Food 18 Recipes 3 Recipes
Wet Cat Food 16 Recipes
Cat Treats

Compare Pet Food Prices Across Multiple Pet Stores