Ingredient file // Fruit or vegetable
Spinach
Real greens, little reason to choose the bag
Spinach is a leafy vegetable added fresh or dried to dog food. It contributes some nutrients and fiber, but its place on the ingredient list does not tell you how much it supplies. Dog studies have not isolated a health benefit from spinach.
- What it is
- Edible spinach leaves used fresh or dried and ground for inclusion in dog food.
- Made from
- Harvested spinach leaves
- Main job
- Small vegetable addition
- Typical amount
- One published dog diet used 1% dried flakes
- Watch for
- Dogs with calcium oxalate stones
- Not the same as
- Spinach extract
Straight answer
Is Spinach safe for dogs?
Read the whole formula beyond the greens
If spinach appears low on the list, treat it as a small vegetable addition. Check the food's nutritional adequacy statement and the ingredients that make up most of the recipe. Choose for the complete diet, not a promise about spinach's iron or antioxidants. For a dog with calcium oxalate stones, ask about the entire diet.
- Why it is in the food
- Small vegetable addition
- Watch for
- Calcium oxalate stone history
Our read // In our catalog
In 1 of every 7 foods we track
Share of foods that list it
15%
474 of the 3,204 foods with an ingredient list on file, from 59 brands. 232 dry dog food, 101 wet dog food, 63 frozen dog food.
Each square is 1% of the catalog
Where it sits on the label
Median position 17. In the top five of 22 foods, so it is usually a minor ingredient.
Above the salt
Listed before the salt in 51% of foods. In the rest it is under about 1% of the recipe.
Price per lb
Median of the cheapest bag price across 230 priced foods, 24% above the catalog. The price is the food's, not the ingredient's.
Who leans on it
14%
of the foods that list it are from Wellness. 59 brands use it in total.
What it is
How it is made
Spinach is harvested as a vegetable crop. To make a dry ingredient, processors sort and wash the leaves, then remove water and grind them into powder that is easier to measure into a recipe.6
- 01 // Source Spinach leaves Harvested leaves supply the raw vegetable; a published powder study began with fresh leaves.
- 02 // Process Sorted and washed Leaves are graded and cleaned to remove dirt before drying.
- 03 // Process Dried and ground A cabinet dryer removes moisture, and a grinder turns the leaves into powder.
- 04 // Output Spinach powder The dry powder is weighed into a recipe without handling bulky fresh leaves.
What is in it
Composition, dry matter
36-38
% protein
Measured across 2 spinach varieties. This is the concentration in dry leaves, not evidence that a small addition supplies meaningful protein to a dog.
Why it is in the bag
What the manufacturer gets
-
01
Adds leaf nutrients
Spinach contributes protein, minerals and fiber. Its contribution to the finished food depends on how much is added; the ingredient list does not disclose that amount.5,6,8
-
02
Adds vegetable color
Spinach powder changed the color of baked foods in a published test. It gives a recipe a recognizable green ingredient, but color says nothing about a dog's health.6
-
03
Stores as a dry ingredient
Drying and grinding make fresh leaves easier to store and measure. That processing adds work; the published dog formula used spinach at a small amount, not as a bulk protein source.4,6
How much A published antioxidant diet for older Beagles contained 1% spinach flakes alongside other vegetables and nutrients; it did not test spinach alone.1,4
Our read // The claims
What the evidence supports
Strong: controlled studies in dogs agree. Some: small or mixed dog data. Thin: mechanism or lab work only. None: nothing, or the evidence points the other way.
-
Brands say
Spinach adds fiber and iron
Evidence
- Strong
- Some
- Thin
- None
A tested dried powder contained 8.19% fiber and 40.36 mg iron per 100 g as sold. Those measurements show what the ingredient carries. They do not show how much a dog gets from an undisclosed recipe amount.6,8
-
Brands say
Spinach boosts older dogs' immunity
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
A 21-dog trial found an immune-cell change when an antioxidant diet was paired with behavioral enrichment. The food contained 1% spinach flakes among many additions. The trial did not show that spinach alone improves immunity.1,4
-
Brands say
Spinach lutein protects dogs' eyesight
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
In a 12-dog trial, a supplement containing lutein and other antioxidants improved some retinal measurements. The dogs received a supplement rather than spinach, so the result cannot show that spinach in food protects vision.2
-
Owners say
Spinach lowers dogs' bladder cancer risk
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
A case-control study compared 92 Scottish Terriers with bladder cancer against 83 controls and found an association for green leafy vegetables as a group. It did not isolate spinach or show that eating it prevents cancer.3
-
Critics say
Spinach is just filler
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
Dried spinach has measured nutrients and fiber. A published dog diet used 1% spinach flakes, a small addition within a mixed formula. Its limited amount does not make the leaf empty, and the study found no spinach-specific benefit.4,5,6
Straight answers
What owners ask
-
Q01
Is it just filler?
NoSpinach has measurable nutrients and fiber. At the small amount used in a published dog diet, its contribution is limited. A spinach listing is a poor reason to choose one complete food over another.4,5,6
-
Q02
Is spinach toxic to dogs?
NoSpinach leaves have been used in published dog diets. Their oxalate content matters for dogs with calcium oxalate stones; it does not make a small spinach addition poisonous to every dog.4,7
-
Q03
Does it replace vitamin supplements?
NoA complete food must meet nutrient requirements for its stated life stage. The ingredient list names spinach but gives neither its amount nor the nutrients it delivers in the finished food.8
-
Q04
Does fresh spinach beat dried?
No proofFresh leaves carry water, while drying makes spinach easier to measure into a recipe. The label does not reveal how much spinach remains in the finished food, and no cited dog trial compares the two forms.6,8
Who uses it
Brands, best sellers and the company it keeps
Top brands, by foods that list it
Foods that list it / all the brand's recipes we track.
Plus 49 more brands.
Amazon best sellers that list it
- #7 Stella & Chewy’s Marie’s Magical Dinner Dust Cage-Free Chicken Recipe Freeze-Dried Raw Dog Food Topper
- #8 Diamond Naturals Skin & Coat Formula All Life Stages Salmon & Potato Formula Dry Dog Food
- #43 Stella & Chewy’s Marie’s Magical Dinner Dust Grass-Fed Beef Recipe Freeze-Dried Raw Dog Food Topper
- #53 Orijen Original Grain-Free Dry Dog Food
- #57 Wellness Complete Health Deboned Chicken & Oatmeal Dry Dog Food
- #72 Wellness Complete Health Small Breed Turkey & Oatmeal Dry Dog Food
- #87 Iams Adult Healthy Weight Dry Dog Food
Rank on Amazon's dog food best seller list, checked October 2026.
Usually listed with, share of the foods that list it
- Chicken 38%
- Flaxseed 35%
- Carrots 34%
- Mixed Tocopherols 30%
- Chicken Fat 25%
- Peas 24%
- Sweet Potatoes 22%
- Chicken Meal 22%
- Beef 18%
- Oatmeal 17%
- Turkey 16%
- Brown Rice 16%
On the shelf
Foods that list Spinach
474 foods in our catalog list it. These 60 list it highest on the label.
Bones & CoBones & Co Boosters Bark Boost Dog Food Topper
WellnessWellness Core 95% Turkey & Spinach Grain-Free Wet Dog Food
The Honest KitchenThe Honest Kitchen Superfood Pour Overs Chicken Dog Food Topper
Evanger'sEvanger’s Grain Free; Super Premium Chicken Dinner Wet Dog Food
The Honest KitchenThe Honest Kitchen Superfood Pour Overs Lamb & Beef Dog Food Topper
NutroNutro Ultra Senior Trio of Proteins Chicken, Lamb & Whitefish with Superfoods Paté Grain-Free Wet Dog Food
TruDogTruDog Elevate Homestyle Bone-In Grain Free Chicken Stew w/ Carrots & Spinach Wet Dog Food
Raw BistroRaw Bistro Turkey Entree 4 Pack Frozen Dog Food
Raw BistroRaw Bistro Turkey Entree 6 Pack Frozen Dog Food
Portland Pet Food CompanyPortland Pet Food Company Meals & Mixers Wally’s Salmon N’ Rice Dog Food Topper
Dave's Pet FoodDave’s Pet Food Dave’s Stewlicious Chicken Pot Pie Dinner for Dogs / Grain-Free Wet Dog Food
Against the GrainAgainst the Grain The Good Egg - Denver Omelet Wet Dog Food Show 48 more
The Honest KitchenThe Honest Kitchen Slow Cooked Chicken One Pot Stew Wet Dog Food
The Honest KitchenThe Honest Kitchen Turkey & Autumn Veggies Butcher Block Pâté Wet Dog Food
Evanger'sEvanger’s EVX Restricted Diet: Digestion Bland Diet Wet Dog Food
Evanger'sEvanger’s Super Premium Lamb & Rice Dinner Wet Dog Food
Evanger'sEvanger’s Super Premium Beef Dinner for Dogs Grain-Free Wet Dog Food
Evanger'sEvanger’s Grain Free LID Venison + Beef Dinner Wet Dog Food
HaloHalo Elevate Homestyle Bone-In Grain Free Chicken Stew w/ Carrots & Spinach Wet Dog Food
AuthorityAuthority Homestyle Adult Wet Dog Food
MerrickMerrick Slow-Cooked BBQ Glazed Chicken Grain-Free Wet Dog Food
NutroNutro Chicken Entreé topped with Bites of Real Chicken & Spinach Grain-Free Wet Dog Food
Stella & Chewy'sStella & Chewy’s Marie’s Magical Dinner Dust Cage-Free Chicken Recipe Freeze-Dried Raw Dog Food Topper
Open FarmOpen Farm Herring & Mackerel Rustic Stew Dog Food Topper
Bones & CoBones & Co Cage-Free Turkey Raw - The Bones & Co. Freeze-Dried Dog Food
Bones & CoBones & Co Cage-Free Chicken Raw - The Bones & Co. Freeze-Dried Dog Food
Bones & CoBones & Co Grass-Fed Beef Raw - The Bones & Co. Freeze-Dried Dog Food
Bones & CoBones & Co Cage-Free Chicken Raw - The Bones & Co. Frozen Dog Food
Bones & CoBones & Co Cage-Free Turkey Raw - The Bones & Co. Frozen Dog Food
Bones & CoBones & Co Cage-Free Duck Raw - The Bones & Co. Frozen Dog Food
Bones & CoBones & Co Grass-Fed Lamb Raw - The Bones & Co. Frozen Dog Food
Bones & CoBones & Co Grass-Fed Beef Raw - The Bones & Co. Frozen Dog Food
Stella & Chewy'sStella & Chewy’s Chicken Little Lil’ Bites - Raw for Small Breeds Freeze-Dried Dog Food
Dave's Pet FoodDave’s Pet Food Dave’s Stewlicious Chunky Chicken and Rice Stew for Dogs / Wet Dog Food
WeruvaWeruva Dogs in the Kitchen Classic Dog Peking Ducken Chicken & Duck in Gravy Wet Dog Food
WeruvaWeruva Dogs in the Kitchen Classic Dog Green Eggs & Chicken with Pumpkin & Greens Grain-Free Wet Dog Food
Now FreshNow Fresh Good Gravy Chicken & Salmon Minced Grain-Free Wet Dog Food
Simply NourishSimply Nourish Original Dog Meal Dog Food Topper
PurinaPurina Beneful Freshly Prepared Stews Turkey Dinner with Spinach and Ditalini Pasta in Gravy Wet Dog Food
CesarCesar Simply Crafted Adult Chicken Dog Food Topper
MerrickMerrick Kitchen Comforts Beef Tips & Rice Stew Wet Dog Food
NutroNutro Ultra Trio of Proteins Chicken, Lamb & Whitefish with Superfoods Paté Grain-Free Wet Dog Food
Stella & Chewy'sStella & Chewy’s Tantalizing Turkey Frozen Raw Dinner Patties Frozen Dog Food
Stella & Chewy'sStella & Chewy’s Tantalizing Turkey Frozen Raw Dinner Morsels Frozen Dog Food
Stella & Chewy'sStella & Chewy’s Chewy’s Chicken Frozen Raw Patties Frozen Dog Food
Stella & Chewy'sStella & Chewy’s Chewy’s Chicken Frozen Raw Dinner Morsels Frozen Dog Food
Stella & Chewy'sStella & Chewy’s Absolutely Rabbit Frozen Raw Dinner Patties Frozen Dog Food
Stella & Chewy'sStella & Chewy’s Raw Puppy Patties Chicken & Salmon Perfectly Puppy Dinner Patties Freeze-Dried Dog Food
Raw BistroRaw Bistro Beef Entree 4 Pack Frozen Dog Food
OC Raw DogOC Raw Dog Complete Meals Lamb & Produce Frozen Dog Food
OC Raw DogOC Raw Dog Complete Meals Turkey & Produce Frozen Dog Food
JinxJinx Beef & Chicken Homemades Grain-Free Wet Dog Food
Earthborn HolisticEarthborn Holistic Grain Free Classics K95 Lamb Wet Dog Food
Natural BalanceNatural Balance Platefulls Tender Carrot, Potato & Beef Recipe Wet Dog Food
AuthorityAuthority Healthy Weight Chicken Entree Adult Dog Wet Dog Food
InstinctInstinct Freshly Crafted Meals Grass-Fed Beef Recipe Dog Food Topper
Hill'sHill’s Prescription Diet Gastrointestinal Biome Wet Dog Food
PurinaPurina Beneful Freshly Prepared Classics With Salmon, Green Beans and Spinach Pate Wet Dog Food
WellnessWellness Core Bowl Boosters Functional Toppers Joint Health Dog Food Topper
TruDogTruDog Garden of Vegan Plant-Based Recipe Adult Grain-Free Wet Dog Food On labels as
Fresh spinach: what changes
One page covers every name. Here is what each label word adds, and whether it changes anything for your dog.
Fresh spinach
Matters for your dog A little
Fresh Spinach
What it means AAFCO's feed term for fresh covers an ingredient that has not been frozen, cooked, dried, rendered or hydrolyzed, and is preserved only by refrigeration. The word describes the ingredient's condition; it promises nothing about nutrient content.
For your dog Raw baby spinach is about 94% water, so fresh leaves weigh far more than the same spinach dried and rank higher on a list sorted by weight. No study we found shows fresh-added spinach gives a dog more nutrition than dried.8,9,10
- Strong
- Some
- Thin
- None
Sources
What we read
Checked September 1, 2026.
- 1 Dietary antioxidants and behavioral enrichment enhance neutrophil phagocytosis in geriatric Beagles
- 2 Antioxidant supplementation increases retinal responses and decreases refractive error changes in dogs
- 3 Evaluation of the effect of dietary vegetable consumption on reducing risk of transitional cell carcinoma of the urinary bladder in Scottish Terriers
- 4 Roles of plant-based ingredients and phytonutrients in canine nutrition and health
- 5 The Effects of Biostimulants, Biofertilizers and Water-Stress on Nutritional Value and Chemical Composition of Two Spinach Genotypes (Spinacia oleracea L.)
- 6 Nutritional characterization and food value addition properties of dehydrated spinach powder
- 7 Treatment recommendations
- 8 Reading Labels
- 9 Buyer Beware: What Research and Resulting Media Got Wrong About The Farmer's Dog's Recent Study
- 10 Baby spinach (nutritional sheet)