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Ingredient file // Fruit or vegetable

Collard Greens

A real leaf with unproven dog benefits

Collard greens are harvested leaves that add plant fiber and minerals to a recipe. The available collard research measures the leaves, not their effects in dogs, so the ingredient does not promise firmer stools, stronger bones, or disease prevention.

Role in the food Supporting nutrient
What it is
Edible collard leaves used as a vegetable ingredient in dog food, often dried and ground for kibble.
Made from
Harvested collard leaves
Main job
Named vegetable and fiber
Typical amount
Not published
Watch for
Extra servings for dogs with calcium oxalate stones
Not the same as
Kale or spinach

Straight answer

Is Collard Greens safe for dogs?

Read past the greens to the recipe

Look at what sits above collards on the ingredient list, then check the nutritional adequacy statement. Collards add some vegetable material, but their listed name gives no dose and proves no stool, bone, or cancer benefit. Do not choose a bag for a collard claim.

Why it is in the food
Named vegetable and fiber

Our read // In our catalog

In 1 of every 178 foods we track

Share of foods that list it

<1%

18 of the 3,204 foods with an ingredient list on file, from 2 brands. 17 dry dog food, 1 freeze-dried dog food.

Each square is 1% of the catalog

Where it sits on the label

Median position 28. In the top five of 0 foods, so it is usually a minor ingredient.

Top five List position, heaviest first

Above the salt

36%

Usually listed after the salt, which caps it at roughly 1% of the recipe in 64% of foods.

Price per lb

Foods with it $4.00
All foods $3.25

Median of the cheapest bag price across 17 priced foods, 23% above the catalog. The price is the food's, not the ingredient's.

Who leans on it

50%

of the foods that list it are from Orijen. 2 brands use it in total.

What it is

How it is made

Collards are grown for their leaves, not recovered from a food-processing waste stream. Fresh leaves contain much water; drying and milling let a kibble maker store and mix them with other ingredients.1,5,8

  1. 01 // Source Collard leaves Growers harvest the edible leaves as a vegetable crop.
  2. 02 // Process Cleaned and trimmed In a documented preparation, workers washed off soil and separated leaves from shoots.
  3. 03 // Process Dried and milled Drying removes water, and milling makes the leaves easier to mix into a kibble recipe.
  4. 04 // Output Prepared greens The dry, ground leaves join other ingredients before the kibble dough is cooked.

What is in it

Composition, dry matter

35

% fiber

Dietary fiber in tested collard leaves. The leaf contains fiber, but a bag does not disclose how much collard fiber its recipe supplies.

Dietary fiber 35%1
Crude protein 26.4%1
True protein 21.2%1
Ash 13%1
Starch 1.7%1

These are averages from sampled market leaves, not a range for pet-food batches. Leaf maturity and growing conditions can change composition. Crude protein also counts nitrogen that is not true protein.1

Why it is in the bag

Adds some fiber and minerals, amount not disclosed

  1. Main nutrition
  2. Supporting nutrient
  3. Does a job
  4. Mostly filler

Per gram, collards carry real nutrients: tested leaves held about 35% dietary fiber and about 2,361 mg calcium per 100 g dry matter. No bag publishes how much it holds. Ingredient lists run by weight, and in one published dry food collards came after an added zinc supplement, which suggests a small amount in that recipe. Read it as a minor vegetable that adds some fiber and minerals and a recognizable green on the label.1,3,4

  1. 01

    Adds vegetable fiber

    Collard leaves contain dietary fiber, which contributes to the recipe's fiber total. Leaf analysis alone cannot predict a dog's stool response.1

  2. 02

    Adds a named green

    A published dry-food ingredient list places collards beside other leafy greens. The name gives shoppers a recognizable vegetable, though that list does not reveal its amount.3,4

  3. 03

    Uses a specialty crop

    An industry report classifies collards as a specialty crop rather than an upcycled residue. Harvesting and drying create a separate supply item; no collard-specific cost advantage was published.5,8

How much No collard-specific feeding rate was found; one published dry-food list names collards among other greens but gives no weight.3,4

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.

  1. Brands say

    Collards improve digestion and stool quality

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    Brands promote collards for digestion. A leaf analysis measured about 35% dietary fiber, but tested no dogs. That number does not show whether collards change stool quality at the amount used in kibble.1,9

  2. Owners say

    Collards protect dogs from bladder cancer

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    A case-control study included 92 Scottish Terriers with bladder cancer and 83 controls. Green leafy vegetable intake was associated with lower risk, but only 1 control reportedly ate collards. The study cannot assign that association to collards.2

  3. Brands say

    Collards support stronger bones in dogs

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    A brand points to collard minerals for bone health. Laboratory testing found calcium in the leaves, but measured no dogs or bone outcomes. The collard amount in finished food is also unknown.1,9

  4. Critics say

    Collards are just filler

    Outruns the evidence

    Evidence

    1. Strong
    2. Some
    3. Thin
    4. None

    In laboratory testing, collard leaves contained dietary fiber, true protein, and minerals. They contribute material nutrients, though an ingredient name alone cannot show how much they contribute to a finished food.1,4

Straight answers

What owners ask

  1. Q01

    Is it just filler?

    No

    Collard leaves contain fiber and minerals, so they have a nutritional role. The label gives no collard amount, however. Read the ingredients above them and the nutritional adequacy statement to judge the food.1,4,6

  2. Q02

    Does it prevent cancer?

    No proof

    The Scottish Terrier study associated green leafy vegetables as a group with lower bladder cancer risk. It was observational, and only 1 control reportedly ate collards. It did not test collards in kibble.2

  3. Q03

    How much is in the bag?

    Not disclosed

    Ingredients appear in descending order by weight, but the list gives no weight for collards. One published food placed them among other greens; that single example cannot tell you the amount in other recipes.3,4

Who uses it

Brands, best sellers and the company it keeps

Top brands, by foods that list it

  1. Orijen 9 / 25
  2. Acana 9 / 23

Foods that list it / all the brand's recipes we track.

Usually listed with, share of the foods that list it

  1. Chicken 56%
  2. Red Lentils 50%
  3. Turkey 50%
  4. Whole Herring 44%
  5. Chicken Liver 33%
  6. Salmon 28%
  7. Pinto Beans 28%
  8. Green Peas 28%
  9. Dehydrated Eggs 28%
  10. Flounder 22%
  11. Lamb 22%
  12. Liver 22%

On the shelf

Foods that list Collard Greens

18 foods in our catalog list it, highest on the label first.

Orijen Tundra Freeze-Dried Dog FoodOrijenOrijen Tundra Freeze-Dried Dog FoodFreeze-Dried // No. 17 on the labelAcana Highest Protein Wild Atlantic Recipe Grain-Free Dry Dog FoodAcanaAcana Highest Protein Wild Atlantic Recipe Grain-Free Dry Dog FoodDry // No. 22 on the labelAcana Freshwater Fish Blend Grain-Free Dry Dog FoodAcanaAcana Freshwater Fish Blend Grain-Free Dry Dog FoodDry // No. 22 on the labelOrijen Amazing Grains, Fit & Trim Dry Dog FoodOrijenOrijen Amazing Grains, Fit & Trim Dry Dog FoodDry // No. 28 on the label
Show 14 more
Acana Highest Protein Meadowland Recipe Grain-Free Dry Dog FoodAcanaAcana Highest Protein Meadowland Recipe Grain-Free Dry Dog FoodDry // No. 23 on the labelAcana Wholesome Grains Sea to Farm Puppy Recipe Dry Dog FoodAcanaAcana Wholesome Grains Sea to Farm Puppy Recipe Dry Dog FoodDry // No. 24 on the labelAcana Red Meat Recipe Grain-Free Dry Dog FoodAcanaAcana Red Meat Recipe Grain-Free Dry Dog FoodDry // No. 27 on the labelAcana Free-Run Poultry Recipe Grain-Free Dry Dog FoodAcanaAcana Free-Run Poultry Recipe Grain-Free Dry Dog FoodDry // No. 27 on the labelAcana Puppy Recipe Grain-Free Dry Dog FoodAcanaAcana Puppy Recipe Grain-Free Dry Dog FoodDry // No. 27 on the labelOrijen Puppy Grain-Free Dry Dog FoodOrijenOrijen Puppy Grain-Free Dry Dog FoodDry // No. 28 on the labelAcana Highest Protein Appalachian Ranch Recipe Grain-Free Dry Dog FoodAcanaAcana Highest Protein Appalachian Ranch Recipe Grain-Free Dry Dog FoodDry // No. 28 on the labelAcana Light & Fit Recipe Grain-Free Dry Dog FoodAcanaAcana Light & Fit Recipe Grain-Free Dry Dog FoodDry // No. 28 on the labelOrijen Senior Grain-Free Dry Dog FoodOrijenOrijen Senior Grain-Free Dry Dog FoodDry // No. 29 on the labelOrijen Regional Red Grain-Free Dry Dog FoodOrijenOrijen Regional Red Grain-Free Dry Dog FoodDry // No. 29 on the labelOrijen Small Breed Grain-Free Dry Dog FoodOrijenOrijen Small Breed Grain-Free Dry Dog FoodDry // No. 29 on the labelOrijen Puppy Large Grain-Free Dry Dog FoodOrijenOrijen Puppy Large Grain-Free Dry Dog FoodDry // No. 29 on the labelOrijen Fit & Trim Grain-Free Dry Dog FoodOrijenOrijen Fit & Trim Grain-Free Dry Dog FoodDry // No. 35 on the labelOrijen Tundra Dry Dog FoodOrijenOrijen Tundra Dry Dog FoodDry // No. 35 on the label

Sources

What we read

Checked October 1, 2026.

  1. 1 Nutrient and Phytochemical Composition of Nine African Leafy Vegetables: A Comparative Study Foods, 2025 // Journal
  2. 2 Evaluation of the effect of dietary vegetable consumption on reducing risk of transitional cell carcinoma of the urinary bladder in Scottish Terriers Journal of the American Veterinary Medical Association, 2005 // Journal
  3. 3 Assessing non-protein nitrogen sources in commercial dry dog foods Translational Animal Science, 2022 // Journal
  4. 4 What’s in the Ingredients List? AAFCO, n.d. // Regulator
  5. 5 How dry pet food is made FEDIAF, n.d. // Industry
  6. 6 “Complete and Balanced” Pet Food U.S. Food and Drug Administration, n.d. // Government
  7. 7 Treatment recommendations University of Minnesota College of Veterinary Medicine, n.d. // University
  8. 8 Pet Food Production and Ingredient Analysis Pet Food Institute, 2025 // Industry
  9. 9 Collard Greens in Dog Food Maev, n.d. // Industry
An ingredient on its own tells you very little. What matters is how much of it there is and where it sits in the list. That is why we weigh the top five rather than reacting to any single name further down. Back to the wiki

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