Castor & Pollux vs Hill's Science Diet

Castor & Pollux vs. Hill's Science Diet

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

Guaranteed Analysis: Hill's Science Diet vs. Castor & Pollux

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.

Castor & Pollux Dog Food vs. Hill's Science Diet Dog Food

Dry Dog Food Castor & Pollux Hill's Science Diet
Crude Protein 33.9% 24.5%
Crude Fat 16.9% 14.8%
Crude Fiber 4.4% 4.3%
Wet/Canned Dog Food Castor & Pollux Hill's Science Diet
Crude Protein 41.1% 25.8%
Crude Fat 22.9% 17.1%
Crude Fiber 6.7% 3.3%

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.

The comparison table above shows that Castor & Pollux dry dog foods provide significantly more protein than Hill's Science Diet. More specifically, Castor & Pollux guarantees at least 9.35% more protein. Similarly, Castor & Pollux wet dog foods provide significantly more protein than Hill's Science Diet wet foods.


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.

There is a small difference between the fat content of Castor & Pollux and Hill's Science Diet. We can see that Castor & Pollux guarantees about 2.17% more fat than Hill's Science Diet. In addition, Castor & Pollux wet dog foods also provide more fat than Hill's Science Diet wet foods.


There is a relatively insignificant difference between the crude fiber content of the two brands. For wet dog foods, Castor & Pollux typically provides a little more fiber (about 3.33% more).

Castor & Pollux Cat Food vs. Hill's Science Diet Cat Food

Dry Cat Food Castor & Pollux Hill's Science Diet
Crude Protein 38.2% 35.2%
Crude Fat 15.7% 18.5%
Crude Fiber 4.0% 5.8%
Wet/Canned Cat Food Castor & Pollux Hill's Science Diet
Crude Protein 42.5% 38.5%
Crude Fat 21.0% 22.0%
Crude Fiber 5.6% 4.4%

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.

According to our average data, Hill's Science Diet typically provides less protein than Castor & Pollux. However, this difference is relatively small and doesn't represent a significant difference between the two brands. In addition, Castor & Pollux wet cat foods also provide more protein than Hill's Science Diet 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):

  • 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.

If you look at the average percentages of crude fat, you'll notice that Hill's Science Diet typically guarantees 2.79% more fat. This is a fairly small difference between Hill's Science Diet and Castor & Pollux, but still worth mentioning. For wet cat foods, Hill's Science Diet and Castor & Pollux provide roughly the same amount of fat.


Both brands provide roughly the same amount of crude fiber. With regards to wet cat food, Castor & Pollux and Hill's Science Diet also provide roughly the same amount of crude fiber.

Castor & Pollux Pet Food Ingredients vs. Hill's Science Diet Pet Food Ingredients

Castor & Pollux and Hill's Science Diet both use the following controversial ingredients in many of their products:

Caramel
Pea Protein
Tomato Pomace
Powdered Cellulose
Pea Protein Concentrate

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

Garlic
Garlic Powder
Organic Pea Protein
Organic Caramel Color
Organic Garlic Powder
Canola Oil (Preserved With Mixed Tocopherols)
Canola Oil (Preserved With Mixed Tocopherols And Citric Acid)

Here are some of the controversial ingredients used only by Hill's Science Diet.

Liver
Corn Flour
Iron Oxide
Pork Plasma
Poultry Fat
Animal Liver
Brewers Rice
Wheat Gluten
Caramel Color
Beef By-Products
Corn Gluten Meal
Pork By-Products
Whole Grain Corn
Whole Grain Wheat
Dried Tomato Pomace
Soybean Protein Isolate

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 Hill's Science Diet.

Menadione Sodium Bisulfite Complex

Product Safety: Recall History of Castor & Pollux & Hill's Science Diet?

Castor & Pollux has been recalled once.

  • May 23, 2018: elevated levels of beef thyroid hormone

Hill's Science Diet has been recalled once.

  • Jan. 31, 2019: elevated levels of Vitamin D

Price Comparison: Which Brand Is More Expensive?

Dry Dog Food Castor & Pollux Hill's Science Diet
Per Pound $4.12 $1.99
Per Calorie $0.0025 $0.0012
Dry Cat Food Castor & Pollux Hill's Science Diet
Per Pound $5.20 $2.90
Per Calorie $0.0031 $0.0017
Wet Dog Food Castor & Pollux Hill's Science Diet
Per Pound $5.41 $3.24
Per Calorie $0.0115 $0.0078
Wet Cat Food Castor & Pollux Hill's Science Diet
Per Pound $6.58 $4.73
Per Calorie $0.0139 $0.0100

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 Castor & Pollux or Hill's Science Diet, 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 Castor & Pollux or Hill's Science Diet will depend on your shopping habits.

Pet owners who use our price comparison feature typically save more than 25% off retail prices for Castor & Pollux and Hill's Science Diet. 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 Castor & Pollux Pet Foods

You can purchase Castor & Pollux pet foods from the following stores:









Where To Buy Hill's Science Diet Pet Foods

You can purchase Hill's Science Diet pet food products from these retailers:









Type Of Pet Foods Available

Product Castor & Pollux Hill's Science Diet
Dry Dog Food 20 Recipes 32 Recipes
Wet Dog Food 36 Recipes 30 Recipes
Dog Treats 25 Treats 15 Treats
Dry Cat Food 6 Recipes 18 Recipes
Wet Cat Food 16 Recipes 39 Recipes
Cat Treats 1 Treats

Compare Pet Food Prices Across Multiple Pet Stores

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