NutriSource Grain Free Dog Food receives the Advisor’s second-highest tier rating of 4 stars.
The NutriSource Grain Free product line includes six dry dry dog foods, each claimed to meet AAFCO nutrient profiles for all life stages.
The following is a list of recipes available at the time of this review.
- NutriSource Grain Free Seafood Select
- NutriSource Grain Free Heartland Select
- NutriSource Grain Free Chicken (4.5 stars)
- NutriSource Grain Free Large Breed Chicken
- NutriSource Grain Free Lamb Meal (4.5 stars)
- NutriSource Grain Free Large Breed Lamb Meal
NutriSource Grain Free Heartland Select was selected to represent the others in the line for this review.
NutriSource Grain Free Heartland Select
Dry Dog Food
Estimated Dry Matter Nutrient Content
Ingredients: Bison, chicken, chicken meal, peas, pea flour, pea starch, menhaden fish meal, sunflower meal, alfalfa meal, flax seeds, sunflower oil, chicken fat (preserved with mixed tocopherols), natural turkey and chicken flavor, tapioca flour, calcium carbonate, dicalcium phosphate, potassium chloride, pea protein, tomato pomace, dried brewers yeast, salt, minerals (zinc proteinate, iron proteinate, copper proteinate, manganese proteinate, cobalt proteinate, selenium yeast), choline chloride, taurine, vitamins (vitamin A acetate, vitamin D3 supplement, vitamin E supplement, niacin, d-calcium pantothenate, thiamine mononitrate, pyridoxine hydrochloride, riboflavin supplement, folic acid, biotin, vitamin B12 supplement), glucosamine hydrochloride, ascorbic acid (source of vitamin C), chondroitin sulfate, Yucca schidigera extract, calcium iodate, rosemary extract, yeast culture (Saccharomyces cerevisiae), dried Lactobacillus acidophilus fermentation product, dried Enterococcus faecium fermentation product, dried Aspergillus niger fermentation product, dried Bacillus subtillis fermentation product
Fiber (estimated dry matter content) = 7.8%
Red items when present indicate controversial ingredients
|Estimated Nutrient Content|
|Dry Matter Basis||28%||17%||48%|
|Calorie Weighted Basis||24%||35%||41%|
The first two ingredients in this dog food are bison and chicken. Although these are quality items, they contain 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 third ingredient is chicken meal. Chicken meal is considered a meat concentrate and contains nearly 300% more protein than fresh chicken.
The fourth ingredient is peas. Peas are a quality source of carbohydrates. Plus (like all legumes) they’re rich in natural fiber.
However, peas contain about 25% protein, a factor that must be considered when judging the actual meat content of this dog food.
The fifth ingredient is pea flour, a powder made from roasted yellow peas. Pea flour contains as much as 25% protein, a factor that must be considered when judging the meat content of this dog food.
The sixth ingredient is pea starch, a paste-like, gluten-free carbohydrate extract probably used here as a binder for making kibble. Aside from its energy content (calories), pea starch is of only modest nutritional value to a dog.
The seventh ingredient is menhaden fish meal, another protein-rich meat concentrate.
Menhaden are small ocean fish related to herring. They’re rich in protein and omega-3 fatty acids. What’s more, in their mid-depth habitat, menhaden are not exposed to mercury contamination as can be typical with deep water species.
Fish meal is typically obtained from the “clean, dried, ground tissue of undecomposed whole fish and fish cuttings” of commercial fish operations.1
The eighth ingredient is sunflower meal, a by-product of the oil extraction process – and an item more typically found in feed for livestock.
Although sunflower meal contains about 34% protein, it 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 ninth ingredient is alfalfa meal. Although alfalfa meal is high in plant protein (about 18%) and fiber (25%), this hay-family item is more commonly associated with horse feeds.
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, 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, pea protein is what remains of a pea after removing the starchy part of the vegetable.
Even though it contains over 80% 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 meat content of this dog food.
Thirdly, 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.
Additionally, we note the inclusion of dried fermentation products in this recipe. Fermentation products are typically added to provide enzymes to aid the animal with digestion.
Next, brewers yeast can be a controversial item. Although it’s a by-product of the beer making process, this ingredient is rich in minerals and other healthy nutrients.
Fans believe yeast repels fleas and supports the immune system.
Critics argue yeast ingredients can be linked to allergies. This may be true, but (like all allergies) only if your particular dog is allergic to the yeast itself.
In addition, a vocal minority insists yeast can increase the risk of developing the life-threatening condition known as bloat. However, this is a claim we’ve not been able to scientifically verify.
In any case, unless your dog is specifically allergic to it, yeast can still be considered a nutritious additive.
What’s more noteworthy here is that brewers yeast contains about 48% protein, a factor that must be considered when judging the actual meat content of this dog food.
And lastly, this food also 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.
NutriSource Grain Free Dog Food
The Bottom Line
Judging by its ingredients alone, NutriSource 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.
As a group, the brand features an average protein content of 28% and a mean fat level of 17%. Together, these figures suggest a carbohydrate content of 47% for the overall product line.
And a fat-to-protein ratio of about 62%.
Near-average protein. Near-average fat. And near-average carbs when compared to a typical dry dog food.
When you consider the protein-boosting effects of the pea products, sunflower and alfalfa meals, flaxseed and brewers yeast, this looks like the profile of a kibble containing a moderate amount of meat.
NutriSource Grain Free Dog Food is a plant-based kibble using a moderate amount of named meats and meat meals and fish as its main sources of animal protein, thus earning the brand 4 stars.
Please note certain products are sometimes given a higher or lower rating based upon our estimate of their total meat content.
Those looking for a quality wet food from the same company may wish to visit our review of NutriSource canned dog food.
A Final Word
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Notes and Updates
09/13/2010 Original review
11/15/2010 Adjusted to read ethoxyquin-free
03/04/2012 Updated (added 2 new recipes)
09/03/2013 Review updated
09/03/2013 Last Update