Diamond Dog Food receives the Advisor’s mid-tier rating of 3.5 stars.
The Diamond Dog Food product line includes the 6 dry recipes listed below.
Each recipe includes its related AAFCO nutrient profile when available on the product’s official webpage: Growth, Maintenance, All Life Stages, Supplemental or Unspecified.
Use the links to compare price and package size at an online retailer.
- Diamond Maintenance [M]
- Diamond Original (2 stars) [M]
- Diamond Hi-Energy (2.5 stars) [M]
- Diamond Performance (4 stars) [A]
- Diamond Premium Adult (4 stars) [A]
- Diamond Puppy Formula (4 stars) [A]
Diamond Maintenance was selected to represent the other products in the line for this review.
Dry Dog Food
Estimated Dry Matter Nutrient Content
Ingredients: Chicken by-product meal, wheat flour, whole grain ground corn, rice bran, dried beet pulp, chicken fat (preserved with mixed tocopherols), millet, ground white rice, fish meal, egg product, flaxseed, natural chicken flavor, potassium chloride, salt, choline chloride, dried Lactobacillus plantarum fermentation product, dried Bacillus subtilis fermentation product, dried Lactobacillus acidophilus fermentation product, dried Enterococcus faecium fermentation product, dried Bifidobacterium animalis fermentation product, vitamin E supplement, iron proteinate, zinc proteinate, copper proteinate, ferrous sulfate, zinc sulfate, copper sulfate, potassium iodide, thiamine mononitrate, manganese proteinate, manganous oxide, ascorbic acid, vitamin A supplement, biotin, niacin, calcium pantothenate, manganese sulfate, sodium selenite, pyridoxine hydrochloride (vitamin B6), vitamin B12 supplement, riboflavin, vitamin D supplement, folic acid
Fiber (estimated dry matter content) = 3.9%
Red denotes controversial item
|Estimated Nutrient Content|
|Dry Matter Basis||24%||13%||54%|
|Calorie Weighted Basis||22%||29%||49%|
The first ingredient in this dog food is chicken by-product meal, a dry rendered product of slaughterhouse waste. It’s made from what’s left of a slaughtered chicken after all the choice cuts have been removed.
In addition to organs, this item can also include feet, beaks, undeveloped eggs and almost anything other than prime skeletal muscle.
On the brighter side, by-product meals are meat concentrates and contain nearly 300% more protein than fresh chicken.
The quality of this ingredient can vary, depending on the caliber of the raw materials obtained by the manufacturer.
The second ingredient is wheat flour, a highly-refined product of wheat milling. 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 corn. Corn is another cereal grain and subject to the same issues as wheat (previously discussed).
The next ingredient is rice bran, a healthy by-product of milling whole grain rice. The bran is the fiber-rich outer layer of the grain containing starch, protein, fat as well as vitamins and minerals.
The fifth ingredient is 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.
The sixth item on the ingredient list is chicken fat. Chicken fat is obtained from rendering chicken, a process similar to making soup in which the fat itself is skimmed from the surface of the liquid.
Chicken fat is high in linoleic acid, an omega-6 fatty acid essential for life. Although it doesn’t sound very appetizing, chicken fat is actually a quality ingredient.
The seventh ingredient is millet, a gluten-free grain harvested from certain seed grasses. Millet is hypoallergenic and naturally rich in B-vitamins and fiber as well as other essential minerals.
The eighth ingredient is ground white rice, another name for rice flour. Ground rice is made from either white or brown rice and is considered a gluten-free substitute for wheat flour.
The next ingredient is fish meal, another protein-rich meat concentrate.
Fish meal is typically obtained from the “clean, dried, ground tissue of undecomposed whole fish and fish cuttings” of commercial fish operations.1
Unfortunately, this particular item is anonymous. Because various fish contain different types of fats, we would have preferred to have known the source species.
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 3 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, 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.
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.
Diamond Dog Food Review
Based on its ingredients alone, Diamond looks like an average dry dog food.
As a group, the brand features an average protein content of 29% and a mean fat level of 19%. Together, these figures suggest a carbohydrate content of 44% for the overall product line.
And a fat-to-protein ratio of about 65%.
Which means this Diamond product line contains…
Near-average protein. Above-average fat. And below-average carbs when compared to other dry dog foods.
When you consider the protein-boosting effect of the flaxseed in this recipe and the corn gluten meal contained in some other recipes, this looks like the profile of a kibble containing a moderate amount of meat.
Diamond is a grain-inclusive dry dog food that utilizes a moderate amount of named by-product and unnamed meat meals as its dominant source of animal protein, thus earning the brand 3.5 stars.
Diamond Dog Food
The following list (if present) includes all dog food recalls since 2009 directly related to this Diamond product line. If there are no recalls listed in this section, we have not yet reported any events.
- Diamond Issues Yet Another Dog Food Recall (5/18/2012)
- Diamond Dog Food Recall Widens (4/30/2012)
- Diamond Dog Food Recall (4/6/2012)
A Final Word
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Important FDA Alert
The FDA is investigating a potential link between diet and heart disease in dogs. Click here for details.
Notes and Updates
- Association of American Feed Control Officials ↩
12/06/2019 Last Update