Iams vs Merrick

Iams vs. Merrick

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

Guaranteed Analysis: Merrick 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. Merrick Dog Food

Dry Dog Food Iams Merrick
Crude Protein 27.4% 37.0%
Crude Fat 14.6% 16.6%
Crude Fiber 5.1% 4.3%
Wet/Canned Dog Food Iams Merrick
Crude Protein 42.0% 44.0%
Crude Fat 24.0% 20.3%
Crude Fiber 5.8% 8.8%

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.

On average, Merrick dry dog food recipes contain 9.61% more protein than Iams recipes. Clearly, there is a significant difference between the protein content of Iams and Merrick. For wet dog foods, Merrick and Iams provide roughly the same amount of protein.


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.

If you look at the average percentages of crude fat, you'll notice that Merrick typically guarantees 2.01% more fat. This is a fairly small difference between Merrick and Iams, but still worth mentioning. In addition, Iams wet dog foods also provide more fat than Merrick wet foods.


As you can see, Merrick and Iams guarantee a similar amount of crude fiber. For wet dog foods, Merrick typically provides a little more fiber (about 3.01% more).

Iams Cat Food vs. Merrick Cat Food

Dry Cat Food Iams Merrick
Crude Protein 36.2% 42.8%
Crude Fat 16.8% 15.9%
Crude Fiber 4.3% 5.2%
Wet/Canned Cat Food Iams Merrick
Crude Protein 50.5% 46.8%
Crude Fat 19.0% 20.6%
Crude Fiber 14.7% 6.0%

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.

The table shows that Iams provides far less protein than Merrick. The difference in protein content is roughly 6.65%. For wet cat foods, Iams typically provides a little more protein (about 3.75% 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.

Merrick and Iams both provide roughly the same amount of crude fat. With regards to wet cat food, Merrick and Iams also provide roughly the same amount of crude fat.


There is a relatively insignificant difference between the crude fiber content of the two brands. For wet cat foods, Iams provides significantly more fiber (about 8.71% more).

Iams Pet Food Ingredients vs. Merrick Pet Food Ingredients

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

Canola Oil
Pea Protein
Caramel Color
Powdered Cellulose

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

Liver
Caramel
Beet Pulp
Corn Meal
Corn Grits
Iron Oxide
Canola Meal
Fish Digest
Ground Corn
Brewers Rice
Wheat Gluten
Tomato Pomace
Vegetable Oil
Feeding Oatmeal
Poultry Giblets
Beef By-Products
Corn Gluten Meal
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 Merrick.

Garlic
Meaty Femur Bone
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 Iams.

Blue 2
Red 40
Corn Oil
Yellow 5
Yellow 6
Ethoxyquin
Added Color
Menadione Sodium Bisulfite Complex
Menadione Dimethylpyrimidinol Bisulfite

Product Safety: Recall History of Iams & Merrick?

Iams has been recalled 2 times.

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

Merrick has been recalled 6 times.

  • Jan. 28, 2011: Salmonella
  • Aug. 8, 2011: Salmonella
  • July 2, 2010: Salmonella
  • Aug. 3, 2010: Salmonella
  • Aug. 13, 2010: Salmonella
  • May 23, 2018: elevated levels of beef thyroid hormone

Price Comparison: Which Brand Is More Expensive?

Dry Dog Food Iams Merrick
Per Pound $1.47 $5.70
Per Calorie $0.0009 $0.0033
Dry Cat Food Iams Merrick
Per Pound $1.80 $7.48
Per Calorie $0.0011 $0.0043
Wet Dog Food Iams Merrick
Per Pound $1.83 $4.44
Per Calorie $0.0037 $0.0111
Wet Cat Food Iams Merrick
Per Pound $4.91 $5.56
Per Calorie $0.0106 $0.0125

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 Merrick, 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 Merrick 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 Merrick. 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:







Where To Buy Merrick Pet Foods

You can purchase Merrick pet food products from these retailers:










Type Of Pet Foods Available

Product Iams Merrick
Dry Dog Food 28 Recipes 37 Recipes
Wet Dog Food 10 Recipes 58 Recipes
Dog Treats 41 Treats
Dry Cat Food 14 Recipes 12 Recipes
Wet Cat Food 31 Recipes 39 Recipes
Cat Treats 2 Treats 2 Treats

Compare Pet Food Prices Across Multiple Pet Stores

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