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Instinct vs Castor & Pollux

Instinct vs. Castor & Pollux

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

Guaranteed Analysis: Castor & Pollux vs. Instinct

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.

Instinct Dog Food vs. Castor & Pollux Dog Food

Dry Dog Food Instinct Castor & Pollux
Crude Protein 35.5% 33.8%
Crude Fat 20.3% 16.8%
Crude Fiber 4.6% 4.4%
Wet/Canned Dog Food Instinct Castor & Pollux
Crude Protein 45.0% 40.8%
Crude Fat 25.1% 23.0%
Crude Fiber 8.1% 6.6%

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, Castor & Pollux and Instinct guarantee a similar amount of crude protein. For wet dog foods, Instinct provides more protein (about 4.27% 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.

If you look at the average percentages of crude fat, you'll notice that Instinct typically guarantees 3.50% more fat. This is a fairly small difference between Instinct and Castor & Pollux, but still worth mentioning. In addition, Instinct wet dog foods also provide more fat than Castor & Pollux wet foods.


Castor & Pollux and Instinct both provide roughly the same amount of crude fiber. With regards to wet dog food, Instinct and Castor & Pollux also provide roughly the same amount of crude fiber.

Instinct Cat Food vs. Castor & Pollux Cat Food

Dry Cat Food Instinct Castor & Pollux
Crude Protein 44.4% 38.2%
Crude Fat 20.4% 15.7%
Crude Fiber 4.1% 4.0%
Wet/Canned Cat Food Instinct Castor & Pollux
Crude Protein 48.2% 43.3%
Crude Fat 24.4% 20.4%
Crude Fiber 8.8% 5.7%

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 Castor & Pollux provides far less protein than Instinct. The difference in protein content is roughly 6.17%. In addition, Instinct wet cat foods also provide more protein than Castor & Pollux 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.

Our analysis shows that Instinct guarantees 4.69% more fat than Castor & Pollux dry cat food recipes. In addition, Instinct wet cat foods also provide more fat than Castor & Pollux wet foods.


There is a relatively insignificant difference between the crude fiber content of the two brands. For wet cat foods, Instinct typically provides a little more fiber (about 3.06% more).

Instinct Pet Food Ingredients vs. Castor & Pollux Pet Food Ingredients

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

Garlic
Pea Protein
Tomato Pomace
Canola Oil (Preserved With Mixed Tocopherols And Citric Acid)

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

Canola Oil
Dried Tomato Pomace

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

Caramel
Garlic Powder
Powdered Cellulose
Organic Pea Protein
Organic Caramel Color
Organic Garlic Powder
Pea Protein Concentrate
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 Instinct.

Menadione Sodium Bisulfite Complex

Product Safety: Recall History of Instinct & Castor & Pollux?

Instinct has been recalled 2 times.

  • July 24, 2015: Salmonella
  • Feb. 15, 2013: Pieces of clear plastic in bag

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 Instinct Castor & Pollux
Per Pound $3.37 $4.23
Per Calorie $0.0018 $0.0025
Dry Cat Food Instinct Castor & Pollux
Per Pound $4.60 $4.80
Per Calorie $0.0024 $0.0029
Wet Dog Food Instinct Castor & Pollux
Per Pound $5.94 $5.64
Per Calorie $0.0110 $0.0119
Wet Cat Food Instinct Castor & Pollux
Per Pound $8.92 $7.47
Per Calorie $0.0181 $0.0157

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 Instinct 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 Instinct 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 Instinct 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 Instinct Pet Foods

You can purchase Instinct pet foods from the following stores:


125 Recipes In-Stock Today

98 Recipes In-Stock Today

89 Recipes In-Stock Today

33 Recipes In-Stock Today

Where To Buy Castor & Pollux Pet Foods

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


90 Recipes In-Stock Today

54 Recipes In-Stock Today

48 Recipes In-Stock Today

3 Recipes In-Stock

Type Of Pet Foods Available

Product Instinct Castor & Pollux
Dry Dog Food 31 Recipes 21 Recipes
Wet Dog Food 19 Recipes 34 Recipes
Dog Treats 23 Treats
Dry Cat Food 16 Recipes 6 Recipes
Wet Cat Food 18 Recipes 18 Recipes
Cat Treats 1 Treats

Compare Pet Food Prices Across Multiple Pet Stores