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Supreme Source vs. Castor & Pollux

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

Guaranteed Analysis: Castor & Pollux vs. Supreme Source

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.

Supreme Source Dog Food vs. Castor & Pollux Dog Food

Dry Dog Food	Supreme Source	Castor & Pollux
Crude Protein	28.9%	32.6%
Crude Fat	12.8%	17.1%
Crude Fiber	9.0%	4.2%

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.

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

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

Supreme Source dry recipes contain 4.34% less fat than Castor & Pollux dry recipes. This difference in fat content is a notable difference between Castor & Pollux and Supreme Source.

The table shows that Castor & Pollux provides far less fiber than Supreme Source. The difference in fiber content is roughly 4.86%.

Supreme Source Cat Food vs. Castor & Pollux Cat Food

Dry Cat Food	Supreme Source	Castor & Pollux
Crude Protein	38.9%	38.2%
Crude Fat	16.7%	15.7%
Crude Fiber	5%	4.0%

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.

Both brands provide roughly the same amount of crude protein.

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, Castor & Pollux and Supreme Source guarantee a similar amount of crude fat.

Castor & Pollux and Supreme Source both provide roughly the same amount of crude fiber.

Supreme Source Pet Food Ingredients vs. Castor & Pollux Pet Food Ingredients

Supreme Source and Castor & Pollux both use the following controversial ingredients in many of their products:

Pea Protein

Tomato Pomace

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

Poultry Fat (Preserved With Mixed Tocopherols)

Here are some of the controversial ingredients used only by Castor & Pollux.

Garlic

Caramel

Garlic Powder

Powdered Cellulose

Organic Pea Protein

Organic Caramel Color

Organic Garlic Powder

Pea Protein Concentrate

Canola Oil (Preserved With Mixed Tocopherols)

Canola Oil (Preserved With Mixed Tocopherols And Citric Acid)

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

Supreme Source and Castor & Pollux both use the following harmful ingredients in many of their products:

Menadione Sodium Bisulfite Complex

Product Safety: Recall History of Supreme Source & Castor & Pollux?

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

Castor & Pollux has been recalled once.

May 23, 2018: elevated levels of beef thyroid hormone

Price Comparison: Which Brand Is More Expensive?

Dry Dog Food	Supreme Source	Castor & Pollux
Per Pound	$2.15	$5.01
Per Calorie	$0.0014	$0.0030

Dry Cat Food	Supreme Source	Castor & Pollux
Per Pound	$3.29	$5.50
Per Calorie	$0.0020	$0.0033

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 Supreme Source or Castor & Pollux, 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 Supreme Source or Castor & Pollux will depend on your shopping habits.

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

You can purchase Supreme Source pet foods from the following stores:

8 Recipes In-Stock Today

Where To Buy Castor & Pollux Pet Foods

You can purchase Castor & Pollux pet food products from these retailers:

46 Recipes In-Stock Today

10 Recipes In-Stock Today

35 Recipes In-Stock Today

Type Of Pet Foods Available

Product	Supreme Source	Castor & Pollux
Dry Dog Food	4 Recipes	17 Recipes
Wet Dog Food	None	28 Recipes
Dog Treats	2 Treats	22 Treats
Dry Cat Food	2 Recipes	6 Recipes
Wet Cat Food	None	18 Recipes
Cat Treats	None	1 Treats