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Iams vs Authority

Iams vs. Authority

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

Guaranteed Analysis: Authority vs. Iams

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.

Iams Dog Food vs. Authority Dog Food

Dry Dog Food Iams Authority
Crude Protein 27.8% 28.9%
Crude Fat 15.1% 14.5%
Crude Fiber 5.1% 4.8%
Wet/Canned Dog Food Iams Authority
Crude Protein 42.7% 41.4%
Crude Fat 23.1% 22.8%
Crude Fiber 6.0% 8.3%

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. With regards to wet dog food, Iams and Authority 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.

Both brands provide roughly the same amount of crude fat. With regards to wet dog food, Iams and Authority also provide roughly the same amount of crude fat.


As you can see, Authority and Iams guarantee a similar amount of crude fiber. For wet dog foods, Authority typically provides a little more fiber (about 2.29% more).

Iams Cat Food vs. Authority Cat Food

Dry Cat Food Iams Authority
Crude Protein 36.0% 36.9%
Crude Fat 16.8% 15.4%
Crude Fiber 4.3% 6.0%
Wet/Canned Cat Food Iams Authority
Crude Protein 50.6% 43.8%
Crude Fat 19.2% 23.6%
Crude Fiber 13.2% 9.2%

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.

Iams and Authority both provide roughly the same amount of crude protein. For wet cat foods, Iams provides more protein (about 6.83% more).


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.

Iams Pet Food Ingredients vs. Authority Pet Food Ingredients

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

Caramel
Beet Pulp
Canola Oil
Ground Corn
Pea Protein
Brewers Rice
Wheat Gluten
Caramel Color
Vegetable Oil
Corn Gluten Meal
Powdered Cellulose
Dried Tomato Pomace

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

Liver
Corn Meal
Corn Grits
Iron Oxide
Canola Meal
Fish Digest
Feeding Oatmeal
Poultry Giblets
Beef By-Products
Meat By-Products
Ground Yellow Corn
Chicken By-Products
Dried Meat By-Products
Chicken By-Product Meal
Ground Whole Grain Corn
Poultry By-Product Meal
Soybean Protein Isolate
Animal Fat (Preserved With Mixed Tocopherols)
Poultry Fat (Preserved With Mixed Tocopherols)

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

Corn
Wheat
Corn Syrup
Animal Liver
Ground Wheat
Poultry Meal
Garlic Powder
Refined Corn Syrup
Dried Garlic Powder
Soybean Protein Concentrate
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.

Iams and Authority both use the following harmful ingredients in many of their products:

Corn Oil
Menadione Sodium Bisulfite Complex

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

Blue 2
Red 40
Yellow 5
Yellow 6
Ethoxyquin
Added Color
Menadione Dimethylpyrimidinol Bisulfite

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

Propylene Glycol

Product Safety: Recall History of Iams & Authority?

Iams has been recalled 2 times.

  • Aug. 14, 2013: Salmonella
  • July 30, 2010: Salmonella

According to our records, Authority has never been recalled.

Price Comparison: Which Brand Is More Expensive?

Dry Dog Food Iams Authority
Per Pound $1.51 $1.57
Per Calorie $0.0009 $0.0010
Dry Cat Food Iams Authority
Per Pound $2.25 $2.50
Per Calorie $0.0013 $0.0015
Wet Dog Food Iams Authority
Per Pound $2.59 $1.66
Per Calorie $0.0055 $0.0034
Wet Cat Food Iams Authority
Per Pound $8.13 $2.59
Per Calorie $0.0181 $0.0052

The average cost-per-lb is heavily influenced by the varying amounts of moisture present in each brand's food products (wet vs. dry food, dry vs. freeze-dried food, etc). However, the average cost-per-kcal eliminates the influence of moisture. Therefore, the average cost-per-kcal is the better metric to consider.

If you'd like to calculate the average cost-per-day or cost-pet-year of feeding Iams or Authority, input your pet's weight into our cost analyzer widget.

Averages price data can identify whether or not there exists a significant price difference between two brands. However, the actual price that you'll pay for Iams or Authority will depend on your shopping habits.

Pet owners who use our price comparison feature typically save more than 25% off retail prices for Iams and Authority. In addition, we currently have some great coupons for our readers.


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 Iams Pet Foods

You can purchase Iams pet foods from the following stores:


33 Recipes In-Stock Today

19 Recipes In-Stock Today

24 Recipes In-Stock Today

Where To Buy Authority Pet Foods

You can purchase Authority pet food products from these retailers:


Type Of Pet Foods Available

Product Iams Authority
Dry Dog Food 29 Recipes 33 Recipes
Wet Dog Food 10 Recipes 19 Recipes
Dog Treats 6 Treats
Dry Cat Food 12 Recipes 18 Recipes
Wet Cat Food 37 Recipes 16 Recipes
Cat Treats 2 Treats

Compare Pet Food Prices Across Multiple Pet Stores