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The short answer: Both are A-tier (90/100) winners by completely different paths. Castor & Pollux Organix is the only USDA-certified organic kibble at retail scale — supply-chain integrity is the headline. Orijen wins on WholePrey animal density — roughly 85% of the formula is fresh meat, eggs, organ, and fish. The 0-point gap reflects two equally credible A-tier philosophies, not two interchangeable products.

The scores

Castor & Pollux Organix Organix Organic Chicken & Brown Rice: A (90/100) — Organic Chicken, Organic Chicken Meal, Organic Oatmeal, Organic Barley, Organic Brown Rice.

Orijen Original: A (90/100) — Fresh Chicken, Fresh Turkey, Fresh Whole Eggs, Fresh Chicken Liver, Fresh Whole Herring.

How the ingredients compare

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

Castor & Pollux: Organic Chicken, Organic Chicken Meal, Organic Oatmeal, Organic Barley, Organic Brown Rice

Orijen: Fresh Chicken, Fresh Turkey, Fresh Whole Eggs, Fresh Chicken Liver, Fresh Whole Herring

Both formulas earn the same v15 score, but the ingredient lineups tell different stories about how they got there — that is where the actual pick decision lives.

Where Castor & Pollux pulls ahead

USDA Organic certification: The entire top of the panel — organic chicken, organic chicken meal, organic oatmeal, organic barley, organic brown rice, organic chicken fat — is certified organic by USDA standards. No synthetic pesticide residue on grains, no antibiotics or growth hormones in the chicken supply chain, no GMO inputs. Few competitor formulas carry this federal certification. Shop on Amazon →

Grain-inclusive carbohydrate base: Owners specifically avoiding grain-free formulations (often due to the FDA's 2018–2024 DCM investigation) prefer Castor & Pollux's organic-grain backbone over Orijen's legume-and-pulse fraction.

Price point: Castor & Pollux Organix typically prices ~25–35% below Orijen Original per pound at retail. For owners shopping for an A-tier kibble who haven't budgeted for the WholePrey premium tier, this is the access point.

Where Orijen holds its own

WholePrey animal ingredient density: Orijen Original's top five ingredients are five different fresh animal sources — chicken, turkey, eggs, chicken liver, and whole herring. The formula runs ~85% animal-derived, far ahead of Castor & Pollux's organic-led but somewhat plant-supplemented profile. Shop on Amazon →

Marine omega-3 from whole fish: Whole herring at #5 supplies naturally occurring EPA/DHA in the form dogs actually use without conversion bottlenecks. Castor & Pollux relies on flaxseed (ALA) and sunflower oil (omega-6) for the fat fraction.

Organ meat inclusion: Fresh chicken liver in the top five is a high-bioavailability micronutrient source — vitamin A, B12, folate, iron, copper. Castor & Pollux has organic chicken liver further down the panel, but not at the same prominence.

The bottom line

Castor & Pollux Organix and Orijen Original both earn A (90/100) for genuinely different reasons. Castor & Pollux wins on certified organic supply-chain integrity at a roughly 30% lower price point and a grain-inclusive carbohydrate base. Orijen wins on WholePrey animal-ingredient density, whole-fish marine omega-3s, and organ meat inclusion. For owners whose top priority is residue-free, organic ingredients across a 10–15 year feeding window, Castor & Pollux is the pick. For owners prioritizing maximum animal-protein density and marine-omega-3 coverage, Orijen earns the premium it commands.