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The short answer: Diamond Naturals wins by 3 points on the v15 rubric — effectively close, but the two products serve completely different dogs. Diamond Naturals Adult Chicken & Rice is everyday adult-maintenance budget kibble at 350-400 kcal/cup, available at Tractor Supply and farm and feed retailers nationwide. Inukshuk Professional 26/16 is a high-NRG sport kibble at 4,500+ kcal/kg (about 540 kcal/cup), engineered for sled dogs, gun dogs, search-and-rescue dogs, and Schutzhund / IPO sport dogs. For sedentary pet dogs, Diamond Naturals is the rational pick. For working dogs running daily mileage, Inukshuk is.

The scores

Diamond Naturals Adult Chicken & Rice Formula: B (78/100) — Chicken, Chicken Meal, Ground White Rice, Cracked Pearled Barley, Grain Sorghum.

Inukshuk Professional 26/16 Working Dog Formula: B (75/100) — Chicken Meal, Fish Meal (Herring and Anchovy), Ground Whole-Grain Barley, Ground Whole-Grain Corn, Ground Whole-Grain Wheat.

How the ingredients compare

The top-five ingredients reveal the formulation split between these two products:

Diamond Naturals: Chicken, Chicken Meal, Ground White Rice, Cracked Pearled Barley, Grain Sorghum

Inukshuk: Chicken Meal, Fish Meal (Herring and Anchovy), Ground Whole-Grain Barley, Ground Whole-Grain Corn, Ground Whole-Grain Wheat

The 3-point gap (Diamond Naturals wins by 3 points) shows where the v15 rubric weights ingredient breadth, protein density, and supplement depth differently.

Where Diamond Naturals pulls ahead

Whole-chicken-plus-meal lead pairing: Diamond Naturals leads with deboned chicken at #1 and chicken meal at #2 — the v15 rubric’s preferred two-protein opener. Fresh whole chicken brings moisture-included muscle meat in primary position; chicken meal at #2 backs it up with post-render concentrated protein density. Inukshuk leads with chicken meal alone in #1 followed by fish meal at #2 — concentrated and honest but the rubric awards more points to fresh whole meat in primary position. Shop on Amazon →

Calibrated for sedentary adult-dog feeding: Diamond Naturals Adult Chicken & Rice runs roughly 360 kcal/cup — standard adult-maintenance density. For a typical 50 lb pet dog at 2-3 cups/day, this delivers appropriate caloric load without stomach-volume distention. Inukshuk’s 540 kcal/cup density will produce rapid weight gain at typical pet-feeding volumes — it’s structurally not the right pick for sedentary adult dogs.

Broad mass-market distribution: Diamond Naturals is stocked at Tractor Supply, Rural King, most farm and feed retailers nationwide, PetSmart, Petco, and Amazon. For travelers, multi-location households, or owners needing to source quickly on short notice, the availability is a practical advantage. Inukshuk distribution is concentrated in working-dog supply outlets, mushing supply shops, and gun-dog supply — not mainstream pet aisles.

Where Inukshuk holds its own

4,500+ kcal/kg per-cup caloric density for working dogs: Inukshuk Professional 26/16 delivers roughly 540 kcal per measured cup — about 50% more than typical adult-maintenance kibble. For a working dog burning 3,000-5,000 kcal/day during mushing, hunting season, or sport competition, the per-cup math means the dog can eat appropriate caloric load without distending the stomach. This is the structural reason Iditarod and Yukon Quest mushers, gun-dog kennels, and search-and-rescue handlers feed Inukshuk — the calorie density is the feature. Shop on Amazon →

Marine omega-3 from fish meal + herring oil double source: Inukshuk includes fish meal (herring and anchovy) at #2 plus herring oil at #11 — two stacked sources of direct marine EPA + DHA omega-3. Diamond Naturals supplies plant omega-3 ALA from flaxseed (in the supplement section) only; the ALA-to-EPA conversion in dogs runs 5-10% at best, so direct marine EPA + DHA is structurally meaningful for joint, skin / coat, and cardiac support. Inukshuk’s working-dog audience needs this functional support; Diamond Naturals’ pet-dog audience can be supplemented separately.

Glucosamine + chondroitin baked into the formula: Inukshuk includes glucosamine hydrochloride and chondroitin sulfate as standard formula ingredients (not relegated to topper status). For working dogs whose joint cartilage absorbs repetitive impact through daily mileage, the baseline supplementation matters. Diamond Naturals Adult Chicken & Rice doesn’t include glucosamine + chondroitin at this product tier — the brand offers separate variants with joint support, but the base adult formula does not carry it.

The bottom line

Diamond Naturals wins by 3 points (B/78 vs B/75) — effectively close, but the score doesn’t tell the picking story. Pick Diamond Naturals for sedentary adult pet dogs needing standard adult-maintenance density at budget-natural pricing with broad retail availability. Pick Inukshuk for working dogs, sled dogs, gun dogs, search dogs, and sport dogs running daily mileage where 540-kcal/cup density is the structural feature and marine omega-3 + joint support are nutritionally meaningful. The 3-point v15 gap reflects rubric weighting; the actual pick depends on how much your dog works.