Purina One vs Hill's Science Diet

Purina One vs. Hill's Science Diet

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

Guaranteed Analysis: Hill's Science Diet vs. Purina One

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.

Purina One Dog Food vs. Hill's Science Diet Dog Food

Dry Dog Food Purina One Hill's Science Diet
Crude Protein 31.6% 24.5%
Crude Fat 17.1% 14.8%
Crude Fiber 4.3% 4.3%
Wet/Canned Dog Food Purina One Hill's Science Diet
Crude Protein 45.3% 25.8%
Crude Fat 25.8% 17.1%
Crude Fiber 7.1% 3.4%

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 Purina One and Hill's Science Diet. On average, Hill's Science Diet dry dog food recipes contain 7.03% less protein than Purina One recipes. In addition, Purina One wet dog foods also provide 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 Purina One and Hill's Science Diet. We can see that Purina One guarantees about 2.34% more fat than Hill's Science Diet. In addition, Purina One 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, Purina One typically provides a little more fiber (about 3.75% more).

Purina One Cat Food vs. Hill's Science Diet Cat Food

Dry Cat Food Purina One Hill's Science Diet
Crude Protein 40.5% 35.2%
Crude Fat 14.5% 18.5%
Crude Fiber 3.6% 5.8%
Wet/Canned Cat Food Purina One Hill's Science Diet
Crude Protein 55.9% 38.5%
Crude Fat 13.9% 22.0%
Crude Fiber 6.9% 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.

Hill's Science Diet dry recipes contain 5.29% less protein than Purina One dry recipes. This difference in protein content is a notable difference between Purina One and Hill's Science Diet. In addition, Purina One 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.

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


If you look at the average percentages of crude fiber, you'll notice that Hill's Science Diet typically guarantees 2.18% more fiber. This is a fairly small difference between Hill's Science Diet and Purina One, but still worth mentioning. In addition, Purina One wet cat foods also provide more fiber than Hill's Science Diet wet foods.

Purina One Pet Food Ingredients vs. Hill's Science Diet Pet Food Ingredients

Purina One and Hill's Science Diet both use the following controversial ingredients in many of their products:

Liver
Pea Protein
Brewers Rice
Wheat Gluten
Caramel Color
Corn Gluten Meal
Whole Grain Corn
Whole Grain Wheat
Powdered Cellulose
Soybean Protein Isolate

Here are some of the controversial ingredients used only by Purina One.

Canola Meal
Ground Wheat
Animal Digest
Soybean Flour
Soybean Hulls
Corn Germ Meal
Meat By-Products
Ground Yellow Corn
Poultry By-Products
Turkey By-Product Meal
Chicken By-Product Meal
Poultry By-Product Meal
Soybean Protein Concentrate
Animal Fat (Preserved With Mixed Tocopherols)

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

Caramel
Corn Flour
Iron Oxide
Pork Plasma
Poultry Fat
Animal Liver
Tomato Pomace
Beef By-Products
Pork By-Products
Dried Tomato Pomace
Pea Protein Concentrate

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

Purina One and Hill's Science Diet both use the following harmful ingredients in many of their products:

Menadione Sodium Bisulfite Complex

Here are some of the harmful ingredients used only by Purina One.

Red 3
Corn Oil
Added Color

Product Safety: Recall History of Purina One & Hill's Science Diet?

Purina One has been recalled once.

  • Aug. 30, 2013: Salmonella

According to our records, Hill's Science Diet has never been recalled.

Price Comparison: Which Brand Is More Expensive?

Dry Dog Food Purina One Hill's Science Diet
Per Pound $1.43 $1.92
Per Calorie $0.0008 $0.0012
Dry Cat Food Purina One Hill's Science Diet
Per Pound $1.71 $2.80
Per Calorie $0.0010 $0.0017
Wet Dog Food Purina One Hill's Science Diet
Per Pound $1.72 $3.04
Per Calorie $0.0034 $0.0074
Wet Cat Food Purina One Hill's Science Diet
Per Pound $5.12 $4.37
Per Calorie $0.0122 $0.0085

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 Purina One 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 Purina One 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 Purina One 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 Purina One Pet Foods

You can purchase Purina One 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 Purina One Hill's Science Diet
Dry Dog Food 14 Recipes 32 Recipes
Wet Dog Food 15 Recipes 30 Recipes
Dog Treats 3 Treats 15 Treats
Dry Cat Food 11 Recipes 18 Recipes
Wet Cat Food 12 Recipes 39 Recipes
Cat Treats

Compare Pet Food Prices Across Multiple Pet Stores

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