Skip to content
In The Kibble
My dogs

Ingredient file // Ingredient

Copper Proteinate

Copper bound to protein to improve absorption.

Our read // In our catalog

In 1 of every 5 foods we track

Share of foods that list it

22%

495 of the 2,250 foods we track, from 37 brands. 406 dry dog food, 62 wet dog food, 17 frozen dog food.

Each square is 1% of the catalog

Where it sits on the label

Median position 34. In the top five of 0 foods, so it is usually a minor ingredient.

Top five List position, heaviest first

Above the salt

4%

Usually listed after the salt, which caps it at roughly 1% of the recipe in 96% of foods.

Price per lb

Foods with it $3.53
All foods $3.24

Median of the cheapest bag price across 343 priced foods, 9% 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. 37 brands use it in total.

What it is

Why it turns up in dog food

  • Supplies copper for connective tissue, iron handling and coat pigment, in a well absorbed form.

Who uses it

Brands, best sellers and the company it keeps

Top brands, by foods that list it

  1. Wellness 71
  2. Nulo 69
  3. Stella & Chewy's 65
  4. Diamond 27
  5. Earthborn Holistic 25
  6. Bil-Jac 21
  7. Verus 17
  8. Horizon 16
  9. Taste of the Wild 16
  10. Annamaet 15

Plus 27 more brands.

Amazon best sellers that list it

  1. #10 Diamond Naturals Skin & Coat Formula All Life Stages Salmon & Potato Formula Dry Dog Food
  2. #17 Taste of the Wild High Prairie Canine Recipe with Roasted Bison & Roasted Venison Dry Dog Food
  3. #40 Stella & Chewy’s Marie’s Magical Dinner Dust Grass-Fed Beef Recipe Freeze-Dried Raw Dog Food Topper
  4. #54 Wellness Complete Health Deboned Chicken & Oatmeal Dry Dog Food
  5. #60 Purina Pro Plan Small Breed Beef And Rice Dry Dog Food
  6. #68 Wellness Complete Health Small Breed Turkey & Oatmeal Dry Dog Food
  7. #73 Diamond Naturals Large Breed Puppy Lamb & Rice Formula Dry Dog Food
  8. #86 Taste of the Wild Ancient Prairie Canine Recipe with Roasted Bison & Roasted Venison 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

  1. Flaxseed 46%
  2. Chicken Fat 44%
  3. Chicken Meal 35%
  4. Peas 34%
  5. Chicken 29%
  6. Lentils 24%
  7. Natural Flavor 22%
  8. Oatmeal 21%
  9. Turkey Meal 21%
  10. Sweet Potatoes 19%
  11. Dried Plain Beet Pulp 19%
  12. Turkey 19%
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

Keep In The Know,
Know What's In The Bowl

Recall alerts by email. We only write when a dog food recall is published.
DOUBLE OPT-IN // ONE CLICK TO STOP // NEVER SHARED