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Iams vs Royal Canin

Iams vs. Royal Canin

In this comparison article for Iams vs Royal Canin, we'll highlight the key differences between these two pet food brands. To properly compare Iams and Royal Canin, 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 Royal Canin 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 Royal Canin Review Page.

Guaranteed Analysis: Royal Canin 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. Royal Canin Dog Food

Dry Dog FoodIamsRoyal Canin
Crude Protein27.6%27.8%
Crude Fat14.9%16.2%
Crude Fiber5.2%4.7%
Wet/Canned Dog FoodIamsRoyal Canin
Crude Protein40.9%36.8%
Crude Fat23.4%20.0%
Crude Fiber5.4%11.7%

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.

As you can see, Iams and Royal Canin guarantee a similar amount of crude protein. For wet dog foods, Iams provides more protein (about 4.05% more).


Crude Fat Comparison For Dog Food

Like protein, fats are an essential part of a dog's body. Fats are needed for the proper development and function of the canine body.

Iams and Royal Canin both provide roughly the same amount of crude fat. For wet dog foods, Iams typically provides a little more fat (about 3.32% more).


There is a relatively insignificant difference between the crude fiber content of the two brands. For wet dog foods, Royal Canin provides more fiber (about 6.29% more).

Iams Cat Food vs. Royal Canin Cat Food

Dry Cat FoodIamsRoyal Canin
Crude Protein35.7%34.5%
Crude Fat15.9%15.7%
Crude Fiber4.6%6.9%
Wet/Canned Cat FoodIamsRoyal Canin
Crude Protein46.7%50.4%
Crude Fat21.8%12.8%
Crude Fiber4.9%10.5%

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.

Both brands provide roughly the same amount of crude protein. For wet cat foods, Royal Canin typically provides a little more protein (about 3.76% 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):

  • Help transport nutrients across cell membranes
  • Fats produce metabolites, which help control inflammation
  • Maintain healthy blood pressure
  • Slow the growth of yeast infections
  • Fats improve the taste/texture of food.

If you look at the average percentages of crude fiber, you'll notice that Royal Canin typically guarantees 2.30% more fiber. This is a fairly small difference between Royal Canin and Iams, but still worth mentioning. In addition, Royal Canin wet cat foods also provide more fiber than Iams wet foods.

Iams Pet Food Ingredients vs. Royal Canin Pet Food Ingredients

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

Caramel
Corn Meal
Corn Grits
Pea Protein
Brewers Rice
Wheat Gluten
Vegetable Oil
Corn Gluten Meal
Powdered Cellulose
Chicken By-Products
Dried Tomato Pomace
Chicken By-Product Meal

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

Liver
Beet Pulp
Canola Oil
Iron Oxide
Fish Digest
Ground Corn
Caramel Color
Feeding Oatmeal
Poultry Giblets
Meat By-Products
Dried Meat By-Products
Ground Whole Grain Corn
Poultry By-Product Meal
Animal Fat (Preserved With Mixed Tocopherols)
Poultry Fat (Preserved With Mixed Tocopherols)

Here are some of the controversial ingredients used only by Royal Canin.

Corn
Wheat
Corn Flour
Corn Syrup
Rice Hulls
Beef Plasma
Canola Meal
Pork Plasma
Tomato Pomace
Propyl Gallate
Pork By-Products
Brewers Rice Flour
Venison By-Products
Duck By-Product Meal
Soybean Protein Isolate
Hydrolyzed Poultry By-Products Aggregate

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

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

Menadione Sodium Bisulfite Complex

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

Blue 2
Red 40
Yellow 5
Yellow 6
Added Color

Here are some of the harmful ingredients used only by Royal Canin.

Bha

Product Safety: Recall History of Iams & Royal Canin?

Iams has been recalled 2 times.

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

Royal Canin has been recalled 3 times.

  • May 11, 2007: Melamine
  • April 19, 2007: Melamine
  • Feb. 2, 2006: excess level of vitamin D3

Price Comparison: Which Brand Is More Expensive?

Dry Dog FoodIamsRoyal Canin
Per Pound$1.52$7.31
Per Calorie$0.0009$0.0043
Dry Cat FoodIamsRoyal Canin
Per Pound$2.03$9.93
Per Calorie$0.0012$0.0059
Wet Dog FoodIamsRoyal Canin
Per Pound$1.90$6.33
Per Calorie$0.0038$0.0144
Wet Cat FoodIamsRoyal Canin
Per Pound$6.97$12.71
Per Calorie$0.0151$0.0354

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 Royal Canin, 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 Royal Canin 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 Royal Canin. 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

15 Recipes In-Stock Today

24 Recipes In-Stock Today

Where To Buy Royal Canin Pet Foods

You can purchase Royal Canin pet food products from these retailers:


78 Recipes In-Stock Today

46 Recipes In-Stock Today

84 Recipes In-Stock Today

Type Of Pet Foods Available

ProductIamsRoyal Canin
Dry Dog Food24 Recipes89 Recipes
Wet Dog Food8 Recipes50 Recipes
Dog TreatsNone2 Treats
Dry Cat Food13 Recipes31 Recipes
Wet Cat Food13 Recipes31 Recipes
Cat Treats2 Treats1 Treats

Compare Pet Food Prices Across Multiple Pet Stores