Hill's Science Diet Adult 6+ Large Breed Chicken Meal, Barley & Rice Recipe vs Purina ONE True Instinct Lean Muscle Support With Real Beef Natural With Added Vitamins, Minerals and Nutrients High Protein

Order follows the Universal Score — the same deterministic engine, the same rules, for every product. Brands can't pay for placement.

The scores

Hill's Science Diet Adult 6+ Large Breed Chicken Meal, Barley & Rice Recipe

Excellent · Confidence B

Purina ONE True Instinct Lean Muscle Support With Real Beef Natural With Added Vitamins, Minerals and Nutrients High Protein

Excellent · Confidence A

Bowlmark scores are independent opinions based on published label information and cited references. They are educational, not veterinary advice, and no substitute for your vet — especially for medical conditions or prescription diets.

Pillar by pillar

Weighted pillar contributions from each product's stored score — nutritional adequacy, ingredient quality, additives & processing, transparency.

Metric	Hill's Science Diet	Purina ONE
Nutritional adequacy	35	35
Ingredient quality	26	29
Additives & processing	20	17
Transparency	9	9

Guaranteed analysis

As printed on each label; dry-matter protein removes the moisture so wet and dry read on the same basis.

Metric	Hill's Science Diet	Purina ONE
Protein	18.7%	32%
Fat	13.5%	9%
Fiber	2.4%	5.5%
Moisture	—	12%
Protein (dry-matter)	20.8%	36.4%

First five ingredients

Hill's Science Diet

Chicken Meal
Cracked Pearled Barley
Brewers Rice
Whole Grain Wheat
Whole Grain Corn

Purina ONE

Beef
chicken meal
soybean meal
oat meal
corn protein meal

Flags on the label

Hill's Science Diet

No warning flags on this label.

Purina ONE

Synthetic vitamin K3 — questioned safety margin vs natural K sources

Cite this page

Bowlmark. "Hill's Science Diet Adult 6+ Large Breed Chicken Meal, Barley & Rice Recipe vs Purina ONE True Instinct Lean Muscle Support With Real Beef Natural With Added Vitamins, Minerals and Nutrients High Protein." https://www.bowlmark.com/compare/hills-science-diet-adult-6-large-breed-chicken-meal-barley-and-rice-recipe-vs-purina-one-true-instinct-lean-muscle-support-with-real-beef-natural-with-added-vitamins-minerals-and-nutrients-high-protein

Engine: Methodology engine v1.1.0 · config 13c99e2f
Verified: Last verified September 5, 2026

The engine and config above are the ones stamped on this page's score — the exact pair that produced the number shown.

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