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The short answer: Muenster Milling wins by 12 points (A/90 vs B/78). The structural split: Muenster uses an ancient-grain carbohydrate base (sorghum + millet + quinoa — grain-inclusive, gluten-free) plus a four-source omega-3 stack and food-form chicken cartilage for joint support. Earthborn Holistic Primitive Natural is grain-free with peas, pea protein, and chickpeas in primary supporting positions — structures the FDA’s 2018–2024 grain-free DCM investigation specifically flagged. Triple meat meal in the lead doesn’t fully offset the legume structure.

The scores

Muenster Milling Ancient Grains with Chicken: A (90/100) — Chicken, Chicken Meal, Grain Sorghum, Millet, Turkey Meal.

Earthborn Holistic Primitive Natural Grain-Free: B (78/100) — Turkey Meal, Chicken Meal, Whitefish Meal, Peas, Pea Protein.

How the ingredients compare

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

Muenster Milling: Chicken, Chicken Meal, Grain Sorghum, Millet, Turkey Meal

Earthborn Holistic: Turkey Meal, Chicken Meal, Whitefish Meal, Peas, Pea Protein

The 12-point gap (Muenster Milling wins by 12 points) shows where the v15 rubric weights ingredient breadth, protein density, and supplement depth differently.

Where Muenster Milling pulls ahead

Grain-inclusive ancient-grain base: Sorghum, millet, and quinoa at positions 3, 4, and 9. Pre-FDA-DCM-watchlist structure. Earthborn Primitive Natural is grain-free with peas at #4 and pea protein at #5 — legume primary positions the FDA specifically flagged. Shop on Amazon →

Four omega-3 sources: Salmon oil, cod liver oil, ground flaxseed, chia seed. Earthborn relies on chicken fat as primary fat source plus some whitefish meal for marine omega-3 — meaningful but single-source.

Chicken cartilage for natural glucosamine: Food-form source of glucosamine and chondroitin sulfate. Earthborn doesn’t list a food-form joint-nutrient source.

Where Earthborn Holistic holds its own

Triple meat meal density in the top three: Turkey meal, chicken meal, and whitefish meal at positions 1–3 deliver high post-render protein density. Muenster leads with chicken (whole) and chicken meal followed by sorghum at #3 — lower meat-meal density at the very top of the panel. Shop on Amazon →

Marine omega-3 from whitefish meal in the lead block: Whitefish meal at #3 supplies marine EPA/DHA in a primary protein position. Muenster’s salmon oil and cod liver oil sit further down the panel as supplement-tier additions rather than primary contributors.

Wider retail distribution: Earthborn Holistic is carried at major pet retailers, online, and at many supermarkets. Muenster Milling is primarily DTC + select retail. For owners who want store-pickup convenience, Earthborn has the distribution edge.

The bottom line

Muenster Milling and Earthborn Holistic Primitive Natural represent two different premium-tier philosophies. Muenster earns A/90 with ancient-grain carbohydrate base, four omega-3 sources, food-form chicken cartilage joint support, deep botanicals, and named probiotics. Earthborn earns B/78 with triple meat meal density in the top three, marine omega-3 from whitefish meal in a primary protein position, and wider retail distribution — but the grain-free legume-heavy carbohydrate base caps its rubric score. For owners avoiding grain-free formulations, Muenster. For owners prioritizing maximum primary-position protein density, Earthborn.