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The short answer: Tie at A (90/100). Castor & Pollux Organix wins on USDA Organic certification (no synthetic pesticide residue, no antibiotics or hormones, no GMO inputs). Fromm Gold wins on five-generation family-mill heritage (Wisconsin since 1904) and a deeper named-probiotic supplement stack. Both are grain-inclusive with quality whole-grain carbohydrate bases.

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.

Fromm Gold Gold Adult: A (90/100) — Duck, Chicken Meal, Chicken, Oatmeal, Brown Rice.

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

Fromm: Duck, Chicken Meal, Chicken, Oatmeal, Brown Rice

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 ingredient lead is certified organic — chicken, chicken meal, oatmeal, barley, brown rice, chicken fat. Fromm Gold uses high-quality conventional ingredients but does not carry USDA Organic. Shop on Amazon →

Organic flaxseed and sunflower oil: The fatty-acid contribution comes from organic plant-oil sources rather than conventional fats. For owners prioritizing residue-free across the entire ingredient panel, this completeness matters.

Chicken liver inclusion: Organic chicken liver appears in the top portion of the panel — a high-bioavailability micronutrient source. Fromm Gold uses chicken and duck as the protein lead but does not front organ meats.

Where Fromm holds its own

Five-generation family mill heritage: Fromm Family Foods has operated in Wisconsin since 1904, family-owned across five generations. They make every Fromm product in their own Wisconsin facilities — no contract manufacturing. The brand has a zero-recall track record across more than a century. Shop on Amazon →

Named probiotic strain depth: Fromm Gold includes Lactobacillus acidophilus, Bifidobacterium animalis, Enterococcus faecium, and other named bacterial fermentation products. Castor & Pollux relies on chicory root as a prebiotic but lists fewer named probiotic strains.

Duck protein diversity: Duck at #1 on the Fromm Gold panel adds a less-common animal protein for dogs with chicken sensitivities or seeking amino-acid variety. Castor & Pollux Organix is chicken-led across its top ingredients.

The bottom line

Castor & Pollux Organix and Fromm Gold both earn A (90/100) for different reasons. Castor & Pollux wins on USDA Organic federal certification across the top of the panel and on organic plant-oil fats. Fromm wins on 117 years of family-mill heritage, named-probiotic depth, and duck-led protein diversity. For owners who value certified organic supply chain over heritage and supplement panel, Castor & Pollux. For owners who value a multi-generational Wisconsin family business with deep digestive-support supplementation, Fromm Gold. Both clear the A-tier rubric threshold cleanly.