Ingredient file // Ingredient
Ferrous Sulfate
An inorganic iron salt used as a mineral supplement.
Our read // In our catalog
In 1 of every 5 foods we track
Share of foods that list it
21%
521 of the 2,533 foods with an ingredient list on file, from 34 brands. 453 dry dog food, 61 wet dog food, 4 dog food topper.
Each square is 1% of the catalog
Where it sits on the label
Median position 30. 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 383 priced foods, 12% below the catalog. The price is the food's, not the ingredient's.
Who leans on it
20%
of the foods that list it are from Blue. 34 brands use it in total.
What it is
Why it turns up in dog food
- Supplies the iron needed to carry oxygen in the blood. A well established, if less absorbable, form than a chelate.
Who uses it
Brands, best sellers and the company it keeps
Top brands, by foods that list it
Plus 24 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
- #17 Taste of the Wild High Prairie Canine Recipe with Roasted Bison & Roasted Venison 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
- #35 Blue Life Protection Formula Small Breed Senior Chicken and Brown Rice Recipe Dry Dog Food
- #36 Purina One SmartBlend Healthy Weight High Protein Formula Adult Premium 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 49%
- Flaxseed 45%
- Chicken Meal 45%
- Peas 44%
- Natural Flavor 41%
- Chicken 41%
- Oatmeal 26%
- Dried Plain Beet Pulp 26%
- Barley 24%
- Brown Rice 24%
- Turkey Meal 19%
- Canola Oil 18%
On labels as
Other names for this
Manufacturers do not all use the same wording. These all mean the same thing.