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 Food Iams Royal Canin
Crude Protein 27.2% 26.5%
Crude Fat 14.3% 15.4%
Crude Fiber 5.1% 5.2%
Wet/Canned Dog Food Iams Royal Canin
Crude Protein 44.3% 30.1%
Crude Fat 21.6% 17.0%
Crude Fiber 7.4% 10.1%

Crude Protein Comparison For Dog Food

Dogs require twenty-two amino acids to sustain life. Eleven 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, Royal Canin and Iams guarantee a similar amount of crude protein. For wet dog foods, Iams provides significantly more protein (about 14.22% 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 provides more fat (about 4.57% more).


There is a relatively insignificant difference between the crude fiber content of the two brands. For wet dog foods, Royal Canin typically provides a little more fiber (about 2.70% more).

Iams Cat Food vs. Royal Canin Cat Food

Dry Cat Food Iams Royal Canin
Crude Protein 36.1% 33.6%
Crude Fat 16.4% 14.6%
Crude Fiber 4.4% 7.3%
Wet/Canned Cat Food Iams Royal Canin
Crude Protein 50.8% 45.2%
Crude Fat 20.0% 13.9%
Crude Fiber 13.8% 10.3%

Crude Protein Comparison For Cat Food

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

If you look at the average percentages of crude protein, you'll notice that Iams typically guarantees 2.55% more protein. This is a fairly small difference between Iams and Royal Canin, but still worth mentioning. In addition, Iams wet cat foods also provide more protein than Royal Canin wet foods.


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.

Both brands provide roughly the same amount of crude fat. For wet cat foods, Iams provides more fat (about 6.12% more).


According to our data, Royal Canin guarantees 2.96% more protein than Iams. Although this difference is relatively small, it's still a notable difference. In addition, Iams wet cat foods also provide more fiber than Royal Canin 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:

Corn Meal
Corn Grits
Canola Meal
Pea Protein
Brewers Rice
Vegetable Oil
Corn Gluten Meal
Powdered Cellulose
Chicken By-Products
Chicken By-Product Meal
Soybean Protein Isolate

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

Liver
Caramel
Beet Pulp
Canola Oil
Iron Oxide
Fish Digest
Ground Corn
Caramel Color
Poultry Giblets
Beef By-Products
Meat By-Products
Ground Yellow Corn
Dried Meat By-Products
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
Rice Hulls
Beef Plasma
Pork Plasma
Wheat Gluten
Tomato Pomace
Pork By-Products
Brewers Rice Flour
Dried Tomato Pomace
Venison By-Products
Duck By-Product Meal
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
Corn Oil
Yellow 5
Yellow 6
Ethoxyquin
Added Color
Menadione Dimethylpyrimidinol Bisulfite

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 Food Iams Royal Canin
Per Pound $1.52 $3.54
Per Calorie $0.0009 $0.0021
Dry Cat Food Iams Royal Canin
Per Pound $1.81 $4.90
Per Calorie $0.0011 $0.0030
Wet Dog Food Iams Royal Canin
Per Pound $3.43 $4.62
Per Calorie $0.0071 $0.0106
Wet Cat Food Iams Royal Canin
Per Pound $4.76 $6.70
Per Calorie $0.0107 $0.0181

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 retailers featured in this article. We are compensated for referring customers. Thank you for shopping with our retail partners!

Where To Buy Iams and Royal Canin Pet Foods

You can purchase Iams pet foods from the following stores:


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

 

Type Of Pet Foods Available

Product Iams Royal Canin
Dry Dog Food 21 Recipes 135 Recipes
Wet Dog Food 13 Recipes 38 Recipes
Dog Treats 5 Treats
Dry Cat Food 16 Recipes 54 Recipes
Wet Cat Food 38 Recipes 40 Recipes
Cat Treats 2 Treats 5 Treats

Compare Pet Food Prices Across Multiple Pet Stores