Label facts comparison

Open Farm Farmstead Duck Grain-Free Cat Kibble vs Purina ONE Plus Indoor Advantage Real Salmon #1 Ingredient Natural With Added Vitamins, Minerals & Nutrients Adult Cat Food

Open Farm and Purina ONE, compared on source-backed label facts. Scores are not used on comparison pages — neither product is placed above the other; the facts sit side by side so the trade-offs are readable.

Open Farm

Open Farm Farmstead Duck Grain-Free Cat Kibble

Cat · Dry · All Life Stages

Product details

Purina ONE

Purina ONE Plus Indoor Advantage Real Salmon #1 Ingredient Natural With Added Vitamins, Minerals & Nutrients Adult Cat Food

Cat · Dry · Adult

Product details

Listed label values

Scaled to the larger listed value per axis. Larger means a larger listed amount — not better. Missing values stay at zero and are reported as not listed.

Open Farm Farmstead Duck Grain-Free Cat Kibble
Purina ONE Plus Indoor Advantage Real Salmon #1 Ingredient Natural With Added Vitamins, Minerals & Nutrients Adult Cat Food

Per-axis percentages for the compared items.
Axis	Open Farm Farmstead Duck Grain-Free Cat Kibble	Purina ONE Plus Indoor Advantage Real Salmon #1 Ingredient Natural With Added Vitamins, Minerals & Nutrients Adult Cat Food
Protein	37%	37%
Fat	19%	9%
Fiber	4.5%	5.2%
Carbs	Not listed	Not listed
Calories	480 kcal/cup	394 kcal/cup
Moisture	10% max	12% max

Quick scan

Core label facts

A short summary before the complete recorded label tables.

Label fact	Open Farm Open Farm Farmstead Duck Grain-Free Cat Kibble	Purina ONE Purina ONE Plus Indoor Advantage Real Salmon #1 Ingredient Natural With Added Vitamins, Minerals & Nutrients Adult Cat Food
Protein (min)	37%	37%
Fat (min)	19%	9%
Fiber (max)	4.5%	5.2%
Moisture (max)	10%	12%
Calories	3840 kcal/kg	3838 kcal/kg
First ingredients	Duck, whitefish meal, herring meal, chickpeas, peas	Salmon, chicken by-product meal, rice, corn gluten meal, soybean meal

Product identity

Product and label details

Recorded identity, audience, format, package, and adequacy information.

Label field	Open FarmOpen Farm Farmstead Duck Grain-Free Cat Kibble	Purina ONEPurina ONE Plus Indoor Advantage Real Salmon #1 Ingredient Natural With Added Vitamins, Minerals & Nutrients Adult Cat Food
Full label title	Open Farm Farmstead Duck Grain-Free Cat Kibble	Not listed
Species	Cat	Cat
Life stage	All Life Stages	Adult
Food format	Dry	Dry
Product line	Open Farm Cat Kibble	Not listed
Flavor / recipe	Farmstead Duck	Not listed
Nutritional adequacy statement	Open Farm Farmstead Duck Recipe is formulated to meet the nutritional levels established by the AAFCO Cat Food Nutrient Profiles for all life stages.	Animal feeding tests using AAFCO procedures substantiate that Purina ONE Plus Indoor Advantage Real Salmon #1 Ingredient provides complete and balanced nutrition for maintenance of adult cats.
Adequacy method	AAFCO profile statement	Not listed
Complete and balanced recorded	Yes	Yes

Recorded nutrients

Guaranteed analysis and calories

Minimums and maximums are reproduced as recorded. A larger number is not automatically better.

Label field	Open FarmOpen Farm Farmstead Duck Grain-Free Cat Kibble	Purina ONEPurina ONE Plus Indoor Advantage Real Salmon #1 Ingredient Natural With Added Vitamins, Minerals & Nutrients Adult Cat Food
Crude protein (min)	37%	37%
Crude fat (min)	19%	9%
Crude fiber (max)	4.5%	5.2%
Moisture (max)	10%	12%
Calcium	1%	Not listed
Phosphorus	0.8%	Not listed
Omega-3	0.4%	Not listed
Omega-6	1.25%	Not listed
Taurine	0.2%	Not listed
Calories	3840 kcal/kg	3838 kcal/kg
Calories per cup	480 kcal/cup	394 kcal/cup

Formula context

Ingredients and formulation comparison

Ingredient order and recorded formulation flags provide context; they do not establish whole-product quality on their own.

Label field	Open FarmOpen Farm Farmstead Duck Grain-Free Cat Kibble	Purina ONEPurina ONE Plus Indoor Advantage Real Salmon #1 Ingredient Natural With Added Vitamins, Minerals & Nutrients Adult Cat Food
First five ingredients	Duck, whitefish meal, herring meal, chickpeas, peas	Salmon, chicken by-product meal, rice, corn gluten meal, soybean meal
Full ingredient list	View full recorded list (16) Duck (unresolved mapping), whitefish meal (unresolved mapping), herring meal (unresolved mapping), chickpeas (unresolved mapping), peas (unresolved mapping), lentils (unresolved mapping), coconut oil (unresolved mapping), pumpkin (unresolved mapping), cranberries (unresolved mapping), apples (unresolved mapping), dried chicory root (unresolved mapping), herring oil (unresolved mapping), vitamins (unresolved mapping), minerals (unresolved mapping), taurine (unresolved mapping), mixed tocopherols (unresolved mapping).	View full recorded list (42) Salmon (unresolved mapping), chicken by-product meal (unresolved mapping), rice (unresolved mapping), corn gluten meal (unresolved mapping), soybean meal (unresolved mapping), whole grain corn (unresolved mapping), soy protein isolate (unresolved mapping), powdered cellulose (unresolved mapping), dried yeast (unresolved mapping), soybean hulls (unresolved mapping), beef fat preserved with mixed-tocopherols (unresolved mapping), canola meal (unresolved mapping), natural flavor (unresolved mapping), phosphoric acid (unresolved mapping), calcium carbonate (unresolved mapping), caramel color (unresolved mapping), salt (unresolved mapping), dried carrots (unresolved mapping), dried spinach (unresolved mapping), choline chloride (unresolved mapping), taurine (unresolved mapping), MINERALS [zinc sulfate, ferrous sulfate, manganese sulfate, copper sulfate, calcium iodate, sodium selenite] (unresolved mapping), VITAMINS [Vitamin E supplement, niacin (Vitamin B-3), Vitamin A supplement, calcium pantothenate (Vitamin B-5), thiamine mononitrate (Vitamin B-1), riboflavin supplement (Vitamin B-2), Vitamin B-12 supplement, pyridoxine hydrochloride (Vitamin B-6), folic acid (Vitamin B-9), Vitamin D-3 supplement, biotin (Vitamin B-7), menadione sodium bisulfite complex (Vitamin K)] (unresolved mapping), L-Lysine monohydrochloride (unresolved mapping), potassium chloride (unresolved mapping), Vitamin E supplement (unresolved mapping).
Primary protein source	Duck	Not listed
Primary carbohydrate source	Chickpeas, peas, and lentils	Not listed
Grain-free label	Yes	Not listed
Animal protein listed first	Yes	Yes
Plant protein concentrate recorded	Not listed	Yes
Legume recorded	Yes	Yes
Filler-presence flag	Not listed	Yes

Label-based calculations

Calculated nutrition context

These values are recorded or calculated from label data. They do not evaluate the product, and missing inputs stay Not listed.

Label field	Open FarmOpen Farm Farmstead Duck Grain-Free Cat Kibble	Purina ONEPurina ONE Plus Indoor Advantage Real Salmon #1 Ingredient Natural With Added Vitamins, Minerals & Nutrients Adult Cat Food
Protein per 1,000 kcal	96.4 g	96.4 g
Fat per 1,000 kcal	49.5 g	23.4 g

Provenance

Source and review record

Use the official links to check current packaging and formulation details. A source confidence note is CMS record metadata; it does not evaluate the product or replace Data Confidence.

Label field	Open FarmOpen Farm Farmstead Duck Grain-Free Cat Kibble	Purina ONEPurina ONE Plus Indoor Advantage Real Salmon #1 Ingredient Natural With Added Vitamins, Minerals & Nutrients Adult Cat Food
Official source	Open official source (opens in a new tab)	Open official source (opens in a new tab)
Source site	Open Farm	Purina
Source confidence note	High	Not listed
Source checked date	Not listed	Not listed

Differences worth noting

Open Farm Farmstead Duck Grain-Free Cat Kibble is more calorie-dense (3840 vs 3838 kcal/kg) — feeding amounts differ accordingly.

Adjust this comparison Open Farm Farmstead Duck Grain-Free Cat Kibble details Purina ONE Plus Indoor Advantage Real Salmon #1 Ingredient Natural With Added Vitamins, Minerals & Nutrients Adult Cat Food details

Similar comparisons

Label facts come from official sources and can change with reformulations. This page compares recorded facts only — it does not evaluate fit for an individual pet. For diet questions tied to a health condition, ask your veterinarian.