Editorial · PetScored desk · May 8, 2026
Why we don’t credit “grain-free.”
Grain-free is the most overconfident phrase in the dog food aisle. PetScored does not add points for it. We do not subtract points for the presence of grains either. The rubric scores what the label can prove, and “grain-free” does not prove much.
The phrase is positioning, not nutrition.
“Grain-free” tells you one thing: this recipe excludes wheat, corn, rice, oats, barley, and similar cereals. It does not tell you what is in the recipe instead. In practice, grain-free recipes replace those starches with peas, lentils, chickpeas, potato, sweet potato, or tapioca. None of those ingredients is inherently better for a dog than rice. Some are arguably more problematic.
Common allergens in dogs are mostly not grains.
The adverse-food-reaction literature in dogs is dominated by animal proteins. Chicken, beef, dairy, and lamb are the most-named triggers across published case series. Wheat appears, but it is not the top of the list, and a chicken- allergic dog will react to a grain-free chicken recipe just as quickly as to a chicken-and-rice recipe. Removing grains does not address the most common sensitivities.
Grains are also not nutritionally inert.
Brown rice contributes fiber and B vitamins. Oats contribute fiber and zinc. Whole grains in a dog food are not a filler — they are a digestible carbohydrate source that also brings micronutrients into the recipe. Penalizing their presence on principle would punish recipes that earned a careful formulation choice.
What the rubric does instead.
The Ingredient Clarity sub-score credits namedingredients regardless of kind. “Brown rice” earns clarity. “Grain products” does not. “Chicken” earns clarity. “Animal byproduct” does not. The Sensitivity Risk sub-score counts common-trigger ingredients high on the label without caring whether the rest of the recipe is grain-free. The Nutrition Fit sub-score uses dry-matter protein and fat bands — it does not care whether the calories came from oats or from lentils.
The DCM concern, briefly.
A separate article covers the grain-free dilated cardiomyopathy concern in detail. Our short answer: the evidence has never been strong enough to credit or penalize grain-free on this axis. The FDA investigation that triggered the panic in 2018 never confirmed a causal link, and was effectively wound down by 2022. PetScored treats the question as open and does not score it.
— The PetScored desk. See the full grain-free DCM article or the full rubric.