Supreme Source Grain-Free Dog Food (Dry)

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Rating: ★★★★☆

Supreme Source Grain Free Dog Food receives the Advisor’s second-highest tier rating of 4 stars.

The Supreme Source Grain Free Dog Food product line includes 4 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.

Use links below to compare price and package sizes at an online retailer.

Supreme Source Lamb Meal and Potato Recipe was selected to represent the other products in the line for this review.

Supreme Source Lamb Meal and Potato Recipe

Dry Dog Food

Estimated Dry Matter Nutrient Content

Protein = 29% | Fat = 12% | Carbs = 51%

Ingredients: Lamb meal, peas, lentils, potatoes, poultry fat (preserved with mixed tocopherols), tomato pomace, natural flavor, salmon oil, dried seaweed meal (Ascophyllum nodosum), salt, betaine, calcium carbonate, choline chloride, carrots, blueberries, cranberries, spinach, parsley, pomegranates, vitamin E supplement, zinc oxide, dl-methionine, zinc proteinate, ferrous sulfate, manganous oxide, vitamin A supplement, d-calcium pantothenate, copper sulfate, manganese proteinate, niacin supplement, riboflavin supplement, calcium iodate, thiamine mononitrate, pyridoxine hydrochloride, copper proteinate, vitamin D3 supplement, folic acid, sodium selenite, biotin, vitamin B12 supplement, cobalt carbonate, rosemary extract

Fiber (estimated dry matter content) = 7.2%

Red items indicate controversial ingredients

Estimated Nutrient Content
MethodProteinFatCarbs
Guaranteed Analysis26%11%NA
Dry Matter Basis29%12%51%
Calorie Weighted Basis26%27%47%
Protein = 26% | Fat = 27% | Carbs = 47%

The first ingredient in this dog food is lamb meal. Lamb meal is considered a meat concentrate and contains nearly 300% more protein than fresh lamb.

The second ingredient includes peas. Peas are a quality source of carbohydrates. And like all legumes, they’re rich in natural fiber.

The third ingredient lists lentils. Lentils are a quality source of carbohydrates. Plus (like all legumes) they’re rich in natural fiber.

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

The fourth ingredient is potato. Potatoes can be considered a gluten-free source of digestible carbohydrates. Yet with the exception of perhaps their caloric content, potatoes are of only modest nutritional value to a dog.

The fifth ingredient is poultry fat. Poultry fat is obtained from rendering, a process similar to making soup in which the fat itself is skimmed from the surface of the liquid.

Poultry fat is high in linoleic acid, an omega-6 fatty acid essential for life.

However, poultry fat is a relatively generic ingredient and can be considered lower in quality than a similar item from a named source animal (like chicken fat).

The sixth 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.

After the natural flavor, we find salmon oil. Salmon oil is naturally rich in the prized EPA and DHA type of omega-3 fatty acids. These two high quality fats boast the highest bio-availability to dogs and humans.

Depending on its level of freshness and purity, salmon oil should be considered a commendable addition.

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 two notable exceptions

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

And lastly, this food contains chelated minerals, minerals that have been chemically attached to protein. This makes them easier to absorb. Chelated minerals are usually found in better dog foods.

Supreme Source Grain Free Dog Food
The Bottom Line

Judging by its ingredients alone, Supreme Source Grain Free Dog Food looks like an above-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 29%, a fat level of 12% and estimated carbohydrates of about 51%.

As a group, the brand features an average protein content of 29% and a mean fat level of 13%. Together, these figures suggest a carbohydrate content of 50% for the overall product line.

And a fat-to-protein ratio of about 44%.

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

When you consider the protein-boosting effect of the peas and lentils, this looks like the profile of a kibble containing a moderate amount of meat.

Bottom line?

Supreme Source Grain Free is a plant-based dry dog food using a moderate amount of named meat meals as its main sources of animal protein, thus earning the brand 4 stars.

Highly 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.

Supreme Source 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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Dog Food Coupons
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Special FDA Alert

The FDA has announced it is investigating a potential connection between grain-free diets and a type of canine heart disease known as dilated cardiomyopathy. Click here for details.

A Final Word

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Notes and Updates

03/21/2018 Last Update