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HOW DOES YOUR DOG FOOD RATE: SCIENCE DIET

Hill’s Science Diet Adult (Dry)

(Original Source: The Dog Food Advisor)

Hill’s Science Diet Adult Dog Food receives the Advisor’s mid-tier rating of 3 stars. Science Diet Adult Advanced Fitness Chicken and Barley was selected to represent the other products in the line for this review.

Hill’s Science Diet Adult Advanced Fitness Chicken and Barley

Dry Dog Food

Estimated Dry Matter Nutrient Content
  • Protein 010025
  • Fat 010015
  • Carbs 010053
Ingredients: 

Chicken, whole grain wheat, cracked pearled barley, whole grain sorghum, whole grain corn, corn gluten meal, chicken meal, pork fat, chicken liver flavor, dried beet pulp, soybean oil, lactic acid, flaxseed, potassium chloride, iodized salt, calcium carbonate, choline chloride, vitamins (vitamin E supplement, l-ascorbyl-2-polyphosphate (source of vitamin C), niacin supplement, thiamine mononitrate, vitamin A supplement, calcium pantothenate, vitamin B12 supplement, pyridoxine hydrochloride, riboflavin supplement, biotin, folic acid, vitamin D3 supplement), minerals (ferrous sulfate, zinc oxide, copper sulfate, manganous oxide, calcium iodate, sodium selenite), oat fiber, taurine, mixed tocopherols for freshness, natural flavors, beta-carotene, apples, broccoli, carrots, cranberries, green peas

Fiber (estimated dry matter content) = 2.2%

Red items indicate controversial ingredients

Estimated Nutrient Content

Method Protein Fat Carbs
Guaranteed Analysis 25% 15% NA
Dry Matter Basis 25% 15% 53%
Calorie Weighted Basis 22% 32% 46%
Calorie Weighted Basis Protein Fat Carbs 22% 46% 32%

Nutrient Type % Composition

Nutrient Type % Composition
Protein 22
Fat 32
Carbs 46
The first ingredient in this dog food is chicken. Although it is a quality item, raw chicken contains about 80% water. After cooking, most of that moisture is lost, reducing the meat content to just a fraction of its original weight.
After processing, this item would probably account for a smaller part of the total content of the finished product.

The second ingredient is wheat. Like corn, wheat is an inexpensive and controversial cereal grain of only modest nutritional value to a dog.

For this reason, we do not consider wheat a preferred component in any dog food.

The third ingredient is barley. Barley is a starchy carbohydrate supplying fiber and other healthy nutrients. However, aside from its energy content, this cereal grain is of only modest nutritional value to a dog.

The fourth ingredient is sorghum. Sorghum (milo) is a starchy cereal grain with a nutrient profile similar to corn.

Since it is gluten-free and boasts a smoother blood sugar behavior than other grains, sorghum may be considered an acceptable non-meat ingredient.

The fifth ingredient is corn. Corn is another cereal grain and subject to the same issues as wheat (previously discussed).

The sixth ingredient is corn gluten meal. Gluten is the rubbery residue remaining once corn has had most of its starchy carbohydrate washed out of it.

Although corn gluten meal contains 60% protein, this ingredient would be expected to have a lower biological value than meat.

And less costly plant-based products like this can notably boost the total protein reported on the label — a factor that must be considered when judging the actual meat content of this dog food.

The seventh ingredient is chicken meal. Chicken meal is considered a meat concentrate and contains nearly 300% more protein than fresh chicken.

The next item is pork fat, a product from rendering pig meat.

Commonly known as lard, pork fat can add significant flavor to any dog food. And it can be high in linoleic acid, an omega-6 fatty acid essential for life.

Although it may not sound very appetizing, pork fat (in moderate amounts) is actually an acceptable pet food ingredient.

From here, the list goes on to include a number of other items.

But to be realistic, ingredients located this far down the list (other than nutritional supplements) are not likely to affect the overall rating of this product.

With six notable exceptions…

First, we find beet pulp. Beet pulp is a controversial ingredient, a high fiber by-product of sugar beet processing.

Some denounce beet pulp as an inexpensive filler while others cite its outstanding intestinal health and blood sugar benefits.

We only call your attention here to the controversy and believe the inclusion of beet pulp in reasonable amounts in most dog foods is entirely acceptable.

Next, soybean oil is red flagged here only due to its rumored (yet unlikely) link to canine food allergies.

However, since soybean oil is high in omega-6 fatty acids and contains no omega-3’s, it’s considered less nutritious than flaxseed oil or a named animal fat.

In addition, flaxseed is one of the best plant sources of healthy omega-3 fatty acids. Provided they’ve first been ground into a meal, flax seeds are also rich in soluble fiber.

However, flaxseed contains about 19% protein, a factor that must be considered when judging the actual meat content of this dog food.

Next, we find no mention of probiotics, friendly bacteria applied to the surface of the kibble after processing to help with digestion.

We also note the inclusion of peas. Peas are a quality source of carbohydrates. And like all legumes, they’re rich in natural fiber.

However, peas contain about 25% protein, a factor that must be considered when judging the meat content of this dog food.

And lastly, the minerals listed here do not appear to be chelated. And that can make them more difficult to absorb. Non-chelated minerals are usually associated with lower quality dog foods.

Hill’s Science Diet Adult Dry Dog Food - The Bottom Line

Judging by its ingredients alone, Hill’s Science Diet Adult Dog Food looks like an average dry product.

But ingredient quality by itself cannot tell the whole story. We still need to estimate the product’s meat content before determining a final rating.

The dashboard displays a dry matter protein reading of 25%, a fat level of 15% and estimated carbohydrates of about 53%.

As a group, the brand features an average protein content of 24% and a mean fat level of 14%. Together, these figures suggest a carbohydrate content of 54% for the overall product line.

And a fat-to-protein ratio of about 59%.

Below-average protein. Below-average fat. And above-average carbs when compared to a typical dry dog food.

When you consider the protein-boosting effect of the corn gluten meal, flaxseed and peas contained in this recipe and the use of pea protein and soybean meal in other recipes, this looks like the profile of a kibble containing a modest amount of meat.

Bottom line?

Hill’s Science Diet Adult is a plant-based dry dog food using a modest amount of named meats as its main sources of animal protein, thus earning the brand 3 stars.

Recommended.

Please note certain recipes are sometimes given a higher or lower rating based upon our estimate of their total meat content and (when appropriate) their fat-to-protein ratios.
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