Diamond vs Hill's Science Diet

Diamond vs. Hill's Science Diet

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

Guaranteed Analysis: Hill's Science Diet vs. Diamond

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.

Diamond Dog Food vs. Hill's Science Diet Dog Food

Dry Dog Food Diamond Hill's Science Diet
Crude Protein 28.2% 24.5%
Crude Fat 17.1% 14.8%
Crude Fiber 4.7% 4.3%
Wet/Canned Dog Food Diamond Hill's Science Diet
Crude Protein 43.9% 25.8%
Crude Fat 25.8% 17.1%
Crude Fiber 4.5% 3.3%

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 data, Diamond guarantees 3.69% more protein than Hill's Science Diet. Although this difference is relatively small, it's still a notable difference. In addition, Diamond 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 Diamond and Hill's Science Diet. We can see that Diamond guarantees about 2.30% more fat than Hill's Science Diet. In addition, Diamond wet dog foods also provide more fat than Hill's Science Diet wet foods.


Hill's Science Diet and Diamond both provide roughly the same amount of crude fiber. With regards to wet dog food, Diamond and Hill's Science Diet also provide roughly the same amount of crude fiber.

Diamond Cat Food vs. Hill's Science Diet Cat Food

Dry Cat Food Diamond Hill's Science Diet
Crude Protein 37.8% 35.2%
Crude Fat 19.7% 18.5%
Crude Fiber 4.7% 5.8%
Wet/Canned Cat Food Diamond Hill's Science Diet
Crude Protein 44.7% 38.5%
Crude Fat 22.0% 22.0%
Crude Fiber 6.1% 4.4%

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.

According to our average data, Hill's Science Diet typically provides less protein than Diamond. However, this difference is relatively small and doesn't represent a significant difference between the two brands. In addition, Diamond 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.

There is a relatively insignificant difference between the crude fat content of the two brands. With regards to wet cat food, Diamond and Hill's Science Diet also provide roughly the same amount of crude fat.


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

Diamond Pet Food Ingredients vs. Hill's Science Diet Pet Food Ingredients

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

Pea Protein
Brewers Rice
Tomato Pomace
Beef By-Products
Corn Gluten Meal
Powdered Cellulose

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

Meat Meal
Canola Oil
Ground Corn
Chicken By-Product Meal
Ground Whole Grain Corn
Poultry By-Product Meal
Canola Oil (Preserved With Mixed Tocopherols)

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

Liver
Caramel
Corn Flour
Iron Oxide
Pork Plasma
Poultry Fat
Animal Liver
Wheat Gluten
Caramel Color
Pork By-Products
Whole Grain Corn
Whole Grain Wheat
Dried Tomato Pomace
Pea Protein Concentrate
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 Diamond.

Menadione Sodium Bisulfite

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

Menadione Sodium Bisulfite Complex

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

Diamond has been recalled once.

  • March 10, 2013: low level of thiamine (Vitamin B1)

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 Diamond Hill's Science Diet
Per Pound $1.16 $1.99
Per Calorie $0.0007 $0.0012
Dry Cat Food Diamond Hill's Science Diet
Per Pound $1.23 $2.90
Per Calorie $0.0007 $0.0017
Wet Dog Food Diamond Hill's Science Diet
Per Pound $2.22 $3.24
Per Calorie $0.0038 $0.0078
Wet Cat Food Diamond Hill's Science Diet
Per Pound $3.16 $4.73
Per Calorie $0.0060 $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 Diamond 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 Diamond 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 Diamond 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 Diamond Pet Foods

You can purchase Diamond 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 Diamond Hill's Science Diet
Dry Dog Food 22 Recipes 32 Recipes
Wet Dog Food 3 Recipes 30 Recipes
Dog Treats 6 Treats 15 Treats
Dry Cat Food 4 Recipes 18 Recipes
Wet Cat Food 3 Recipes 39 Recipes
Cat Treats

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