Hill’s Science Diet Adult Perfect Weight (Dry)

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Rating: ★★★½☆

Hill’s Science Diet Adult Perfect Weight Dog Food receives the Advisor’s mid-tier rating of 3.5 stars.

The Hill’s Science Diet Adult Perfect Weight product line includes 2 dry dog foods.

Each recipe below includes its related AAFCO nutrient profile when available on the product’s official webpage: Growth, Maintenance, All Life Stages, Supplemental or Unspecified.

Important: Because many websites do not reliably specify which Growth or All Life Stages recipes are safe for large breed puppies, we do not include that data in this report. Be sure to check actual packaging for that information.

  • Hill’s Science Diet Adult Perfect Weight [M]
  • Hill’s Science Diet Adult Perfect Weight Small/Toy Breed [M]

Hill’s Science Diet Adult Perfect Weight was selected to represent both products in the line for this review.

Hill's Science Diet Adult Perfect Weight

Dry Dog Food

Estimated Dry Matter Nutrient Content

Protein = 29% | Fat = 12% | Carbs = 52%

Ingredients: Chicken, cracked pearled barley, brown rice, pea fiber, corn gluten meal, chicken meal, dried tomato pomace, oat fiber, chicken liver flavor, flaxseed, dried beet pulp, coconut oil, pork flavor, lactic acid, potassium chloride, l-lysine, dl-methionine, carrots, iodized salt, lipoic acid, 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 (manganese sulfate, ferrous sulfate, zinc oxide, copper sulfate, calcium iodate, sodium selenite), taurine, l-carnitine, mixed tocopherols for freshness, natural flavors, beta-carotene, apples, broccoli, cranberries, green peas

Fiber (estimated dry matter content) = 11%

Red items indicate controversial ingredients

Estimated Nutrient Content
MethodProteinFatCarbs
Guaranteed Analysis29%12%NA
Dry Matter Basis29%12%52%
Calorie Weighted Basis26%27%47%
Protein = 26% | Fat = 27% | Carbs = 47%

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 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 third ingredient is brown rice, a complex carbohydrate that (once cooked) can be fairly easy to digest. However, aside from its natural energy content, rice is of only modest nutritional value to a dog.

The fourth ingredient includes pea fiber, a mixture of both soluble and insoluble dietary fiber derived from pea hulls. Aside from the usual benefits of fiber, this agricultural by-product provides no other nutritional value to a dog.

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

The seventh ingredient is tomato pomace. Tomato pomace is a controversial ingredient, a by-product remaining after processing tomatoes into juice, soup and ketchup.

Many praise tomato pomace for its high fiber and nutrient content, while others scorn it as an inexpensive pet food filler.

Just the same, there’s probably not enough tomato pomace here to make much of a difference.

The eighth ingredient is oat fiber, one of the richest sources of soluble dietary fiber of any cereal grains.

Soluble fiber is especially known for its ability to lower cholesterol in humans (which may not be as important for dogs).

After the chicken liver flavor, we find flaxseed, 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.

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 four notable exceptions

First, beet pulp is considered 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, we note the inclusion of coconut oil, a natural oil rich in medium-chain fatty acids.

Medium-chain triglycerides have been shown to improve cognitive function in older dogs.1

Because of its proven safety2 as well as its potential to help in the treatment of canine cognitive dysfunction syndrome (CDS) and chronic skin disorders, MCT can be considered a positive addition to this recipe.

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

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 Perfect Weight Dog Food
The Bottom Line

Judging by its ingredients alone, Hill’s Science Diet Adult Perfect Weight looks like an average dry dog food.

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 29%, a fat level of 12% and estimated carbohydrates of about 52%.

As a group, the brand features an average protein content of 29% and a mean fat level of 12%. Together, these figures suggest a carbohydrate content of 52% for the overall product line.

And a fat-to-protein ratio of about 42%.

Near-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 and flaxseed, this looks like the profile of a kibble containing a moderate amount of meat.

Bottom line?

Hill’s Science Diet Adult Perfect Weight is a plant-based dry dog food using a moderate amount of named meat as its main source of animal protein, thus earning the brand 3.5 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.

Hill’s Science Diet Dog Food
Recall History

The following list (if present) includes all dog food recalls since 2009 directly related to this product line. If there are no recalls listed in this section, we have not yet reported any events.

You can view a complete list of all dog food recalls sorted by date. Or view the same list sorted alphabetically by brand.

To learn why our ratings have nothing to do with a product’s recall history, please visit our Dog Food Recalls FAQ page.

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A Final Word

The descriptions and analyses expressed in this and every article on this website represent the views and opinions of the author.

The Dog Food Advisor does not test dog food products.

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Although it's our goal to ensure all the information on this website is correct, we cannot guarantee its completeness or its accuracy; nor can we commit to ensuring all the material is kept up-to-date on a daily basis.

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Each review is offered in good faith and has been designed to help you make a more informed decision when buying dog food.

However, due to the biological uniqueness of every animal, none of our ratings are intended to suggest feeding a particular product will result in a specific dietary response or health benefit for your pet.

For a better understanding of how we analyze each product, please read our article, "The Problem with Dog Food Reviews".

Remember, no dog food can possibly be appropriate for every life stage, lifestyle or health condition. So, choose wisely. And when in doubt, consult a qualified veterinary professional for help.

In closing, we do not accept money, gifts or samples from pet food companies in exchange for special consideration in the preparation of our reviews or ratings.

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Have an opinion about this dog food? Or maybe the review itself? Please know we welcome your comments.

Notes and Updates

06/28/2017 Last Update

  1. Pan Y et al, Dietary supplementation with medium-chain TAG has long-lasting cognition-enhancing effects in aged dogs, British Journal of Nutrition, Volume 103, Issue 12, June 2010, pp 1746-1754
  2. Matulka RA et al, Lack of toxicity by medium chain triglycerides (MCT) in canines during a 90-day feeding study,Food Chem Toxicol, Jan 2009, 47(1) 35-9.
  • eslam rashad ramadan

    us. It is a very effective product i push it in my site https://specialtydogs.com/product/hills-science-diet-adult-light-dry-dog-food/

  • haleycookie

    Well the fact of the matter is the majority of dog food companies will source some vitamins from China. I know purina does, and the new chewy food American journey does as well I believe. I’m sure there are more. Simply because some vitamins are hard to obtain as China seems to have a monoply on who produces them. Most human vitamins are sourced out of China as well.

  • Christine Warren

    Sorry i didn’t see your reply.I pressed them,they tried to give me the Europe,etc story.Finally came down to,2 of the ingredients are from China.Two of the vitamins.

  • haleycookie

    The US. as for sourcing of ingredients Hills pulls from all over the world.

  • Christine Warren

    Where is this made??

  • Renata Appel

    Hills dry food caused explosive diahrrea on both my shibas. I wouldn’t recommend.

  • Jän Thømas R.

    boom. roasted @hills

  • Jän Thømas R.

    wait, this Science Diet formula with most of its protein coming from corn gets the exact same rating as Fromm Classic? let’s just keep helping vets and the Hills company sell their overpriced junk…

  • pugmomsandy

    hello