Ingredient file // Ingredient
Copper Sulfate
Printed as “Copper Sulphate” on some labels. Same ingredient.
An inorganic copper salt used as a trace mineral supplement.
Our read // In our catalog
In 1 of every 4 foods we track
Share of foods that list it
23%
608 of the 2,595 foods with an ingredient list on file, from 37 brands. 525 dry dog food, 74 wet dog food, 6 dog food topper.
Each square is 1% of the catalog
Where it sits on the label
Median position 35. In the top five of 0 foods, so it is usually a minor ingredient.
Above the salt
Usually listed after the salt, which caps it at roughly 1% of the recipe in 100% of foods.
Price per lb
Median of the cheapest bag price across 442 priced foods, 17% below the catalog. The price is the food's, not the ingredient's.
Who leans on it
17%
of the foods that list it are from Blue. 37 brands use it in total.
What it is
Why it turns up in dog food
- Supplies copper for iron metabolism, connective tissue and coat pigment. Absorbed better than copper oxide, though less well than a chelate.
Who uses it
Brands, best sellers and the company it keeps
Top brands, by foods that list it
Plus 27 more brands.
Amazon best sellers that list it
- #1 Blue Life Protection Formula Adult Chicken and Brown Rice Recipe Dry Dog Food
- #5 Blue Life Protection Formula Adult Small Breed Chicken and Brown Rice Recipe Dry Dog Food
- #8 Diamond Naturals Skin & Coat Formula All Life Stages Salmon & Potato Formula Dry Dog Food
- #12 Pedigree Adult Grilled Steak & Vegetable Flavor Dry Dog Food
- #17 Taste of the Wild High Prairie Canine Recipe with Roasted Bison & Roasted Venison Dry Dog Food
- #22 Cesar Filet Mignon Flavor & Spring Vegetables Garnish Dry Dog Food
- #27 Blue Life Protection Formula Senior Chicken and Brown Rice Recipe Dry Dog Food
- #30 Blue Life Protection Formula Puppy Chicken and Brown Rice Recipe 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 Fat 47%
- Chicken Meal 42%
- Flaxseed 42%
- Chicken 41%
- Natural Flavor 40%
- Peas 40%
- Oatmeal 26%
- Dried Plain Beet Pulp 24%
- Barley 22%
- Brown Rice 22%
- Turkey Meal 17%
- Canola Oil 16%
On labels as
Other names for this
Manufacturers do not all use the same wording. These all mean the same thing.