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Open Farm vs Castor & Pollux

Open Farm vs. Castor & Pollux

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

Guaranteed Analysis: Castor & Pollux vs. Open Farm

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.

Open Farm Dog Food vs. Castor & Pollux Dog Food

Dry Dog Food Open Farm Castor & Pollux
Crude Protein 38.2% 33.8%
Crude Fat 25.5% 16.8%
Crude Fiber 4.6% 4.4%
Wet/Canned Dog Food Open Farm Castor & Pollux
Crude Protein 44.4% 40.8%
Crude Fat 31.9% 23.0%
Crude Fiber 11.1% 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.

There is a relatively large difference between the protein content of Open Farm and Castor & Pollux. On average, Castor & Pollux dry dog food recipes contain 4.44% less protein than Open Farm recipes. For wet dog foods, Open Farm typically provides a little more protein (about 3.68% more).


Crude Fat Comparison For Dog Food

Fats are an absolutely vital component of a balanced canine diet. Not only do fats provide energy, but they also serve important roles in the normal development and function of your dog's body. For example, fats help dogs produce prostaglandins, which reduce inflammation among many other significant functions.

The comparison table above shows that Open Farm dry dog foods provide significantly more fat than Castor & Pollux. More specifically, Open Farm guarantees at least 8.70% more fat. Similarly, Open Farm wet dog foods provide significantly more protein than Castor & Pollux wet foods.


There is a relatively insignificant difference between the crude fiber content of the two brands. For wet dog foods, Open Farm provides more fiber (about 4.47% more).

Open Farm Cat Food vs. Castor & Pollux Cat Food

Dry Cat Food Open Farm Castor & Pollux
Crude Protein 41.1% 38.2%
Crude Fat 20% 15.7%
Crude Fiber 3.3% 4.0%
Wet/Canned Cat Food Open Farm Castor & Pollux
Crude Protein 43.5% 43.3%
Crude Fat 29.2% 20.4%
Crude Fiber 11.1% 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.

There is a small difference between the protein content of Open Farm and Castor & Pollux. We can see that Open Farm guarantees about 2.91% more protein than Castor & Pollux. For wet cat foods, Open Farm and Castor & Pollux provide roughly the same amount of 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):

  • Fats help with the digestion and absorption of fat-soluble vitamins
  • Reduce inflammation associated with arthritis
  • Slow the growth of yeast infections
  • Prevent or reduce the likelihood of certain heart problems.
  • Aid in the development of the retina and visual cortex.

Castor & Pollux dry recipes contain 4.27% less fat than Open Farm dry recipes. This difference in fat content is a notable difference between Open Farm and Castor & Pollux. In addition, Open Farm wet cat foods also provide more fat than Castor & Pollux wet foods.


Both brands provide roughly the same amount of crude fiber. For wet cat foods, Open Farm provides more fiber (about 5.37% more).

Open Farm Pet Food Ingredients vs. Castor & Pollux Pet Food Ingredients

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

Garlic
Caramel
Pea Protein
Garlic Powder
Tomato Pomace
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)

Product Safety: Recall History of Open Farm & Castor & Pollux?

According to our records, Open Farm 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 Open Farm Castor & Pollux
Per Pound $21.44 $4.23
Per Calorie $0.0024 $0.0025
Dry Cat Food Open Farm Castor & Pollux
Per Pound $5.75 $4.80
Per Calorie $0.0033 $0.0029
Wet Dog Food Open Farm Castor & Pollux
Per Pound $5.12 $5.64
Per Calorie $0.0118 $0.0119
Wet Cat Food Open Farm Castor & Pollux
Per Pound $7.76 $7.47
Per Calorie $0.0188 $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 Open Farm 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 Open Farm 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 Open Farm 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 Open Farm Pet Foods

You can purchase Open Farm pet foods from the following stores:


32 Recipes In-Stock Today

2 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 Open Farm Castor & Pollux
Dry Dog Food 5 Recipes 21 Recipes
Wet Dog Food 4 Recipes 34 Recipes
Dog Treats 5 Treats 23 Treats
Dry Cat Food 4 Recipes 6 Recipes
Wet Cat Food 6 Recipes 18 Recipes
Cat Treats 1 Treats

Compare Pet Food Prices Across Multiple Pet Stores