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Diamond vs Supreme Source

Diamond vs. Supreme Source

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

Guaranteed Analysis: Supreme Source vs. Diamond

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.

Diamond Dog Food vs. Supreme Source Dog Food

Dry Dog Food Diamond Supreme Source
Crude Protein 27.6% 28.9%
Crude Fat 16.7% 12.8%
Crude Fiber 4.5% 9.0%

Crude Protein Comparison For Dog Food

Protein is an extremely important part of your dog's diet. Without sufficient protein, dogs can develop a wide-range of serious health problems.

Both brands provide roughly the same amount of crude protein.


Crude Fat Comparison For Dog Food

Dietary fats serves a multitude of roles in the proper development and function of our canine companions. Here are some of the benefits (not exhaustive):

  • Help produce prostaglandins, which reduce inflammation among other critical functions.
  • Aid in the absorption of fat-soluble vitamins
  • Improve skin and coat health
  • Improve the palatially of your dog's food

According to our average data, Supreme Source typically provides less fat than Diamond. However, this difference is relatively small and doesn't represent a significant difference between the two brands.


Diamond dry recipes contain 4.55% less fiber than Supreme Source dry recipes. This difference in fiber content is a notable difference between Supreme Source and Diamond.

Diamond Cat Food vs. Supreme Source Cat Food

Dry Cat Food Diamond Supreme Source
Crude Protein 36.7% 38.9%
Crude Fat 17.6% 16.7%
Crude Fiber 5.2% 5%

Crude Protein Comparison For Cat Food

Protein is an extremely important part of your cat's diet. Without sufficient protein, cats can develop a wide-range of serious health problems.

If you look at the average percentages of crude protein, you'll notice that Supreme Source typically guarantees 2.22% more protein. This is a fairly small difference between Supreme Source and Diamond, but still worth mentioning.


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):

  • Aid in the digestion and absorption of fat-soluble vitamins
  • Improve the health of skin/coat
  • Slow the growth of yeast infections
  • Slow the development and spread of certain type of cancers.
  • Maintain healthy blood pressure

As you can see, Supreme Source and Diamond guarantee a similar amount of crude fat.


Supreme Source and Diamond both provide roughly the same amount of crude fiber.

Diamond Pet Food Ingredients vs. Supreme Source Pet Food Ingredients

Diamond and Supreme Source both use the following controversial ingredients in many of their products:

Tomato Pomace

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

Meat Meal
Canola Oil
Ground Corn
Brewers Rice
Beef By-Products
Corn Gluten Meal
Powdered Cellulose
Chicken By-Product Meal
Ground Whole Grain Corn
Poultry By-Product Meal
Canola Oil (Preserved With Mixed Tocopherols)

Here are some of the controversial ingredients used only by Supreme Source.

Pea Protein
Poultry Fat (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 Diamond.

Menadione Sodium Bisulfite

Here are some of the harmful ingredients used only by Supreme Source.

Menadione Sodium Bisulfite Complex

Product Safety: Recall History of Diamond & Supreme Source?

Diamond has been recalled once.

  • March 10, 2013: low level of thiamine (Vitamin B1)

According to our records, Supreme Source has never been recalled.

Price Comparison: Which Brand Is More Expensive?

Dry Dog Food Diamond Supreme Source
Per Pound $1.35 $1.77
Per Calorie $0.0008 $0.0012
Dry Cat Food Diamond Supreme Source
Per Pound $1.98 $2.84
Per Calorie $0.0012 $0.0017

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 Diamond or Supreme Source, 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 Diamond or Supreme Source will depend on your shopping habits.

Pet owners who use our price comparison feature typically save more than 25% off retail prices for Diamond and Supreme Source. 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 Diamond Pet Foods

You can purchase Diamond pet foods from the following stores:


43 Recipes In-Stock Today

30 Recipes In-Stock Today

33 Recipes In-Stock Today

Where To Buy Supreme Source Pet Foods

You can purchase Supreme Source pet food products from these retailers:


10 Recipes In-Stock Today

Type Of Pet Foods Available

Product Diamond Supreme Source
Dry Dog Food 27 Recipes 4 Recipes
Wet Dog Food 3 Recipes
Dog Treats 6 Treats 4 Treats
Dry Cat Food 6 Recipes 2 Recipes
Wet Cat Food 3 Recipes
Cat Treats 3 Treats

Compare Pet Food Prices Across Multiple Pet Stores