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Ingredient file // Other

Dried Bacillus Subtilis Fermentation Product

A dried culture with an unproven gut payoff

Manufacturers dry material from growing Bacillus subtilis on a nutrient medium. It may carry fermentation substances or live cells, but the ingredient name tells you neither how much is active nor whether your dog benefits.

Role in the food Does a job
What it is
Dried material from a Bacillus subtilis culture, including substances made as the bacteria grow.
Made from
Bacillus subtilis and a nutrient medium
Main job
Fermentation based additive
Typical amount
Not published
Watch for
No guaranteed live count or tested preparation
Not the same as
A guaranteed live probiotic

Straight answer

Is Dried Bacillus Subtilis Fermentation Product safe for dogs?

Ask for the product behind the claim

Read this line as a clue to how an additive was made, not proof of a live probiotic or a digestive result. Judge the food's main ingredients first. If the bag promises gut or breath benefits, look for the exact preparation, an applicable guarantee, and a dog trial using that preparation.

Why it is in the food
Fermentation based additive

Our read // In our catalog

In 1 of every 12 foods we track

Share of foods that list it

8%

258 of the 3,204 foods with an ingredient list on file, from 19 brands. 255 dry dog food, 1 frozen dog food, 1 freeze-dried dog food.

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.

Top five List position, heaviest first

Above the salt

0%

Usually listed after the salt, which caps it at roughly 1% of the recipe in 100% of foods.

Price per lb

Foods with it $2.59
All foods $3.25

Median of the cheapest bag price across 220 priced foods, 20% below the catalog. The price is the food's, not the ingredient's.

Who leans on it

22%

of the foods that list it are from Wellness. 19 brands use it in total.

What it is

How it is made

Feed suppliers grow Bacillus subtilis on a nutrient medium to make enzymes or other fermentation substances. They dry the resulting material for use in feed. This is a manufactured additive, not necessarily a waste stream.6,8

  1. 01 // Source Culture and nutrients A selected Bacillus subtilis culture receives a medium that supplies nutrients for growth.
  2. 02 // Process Culture grows As the bacteria grow, enzymes and other fermentation substances enter the culture material.
  3. 03 // Process Material dried The fermented material is dried; the ingredient name does not specify a viable cell count.
  4. 04 // Output Dried product The resulting dry ingredient reaches a feed plant with specifications that depend on its supplier.

What is in it

Composition, as fed

12

% protein, min

Minimum protein guaranteed by one feed-grade product of this name. Dosed in grams, not pounds per bag, it barely moves a diet's protein.

Crude protein 12%5
Crude fiber 8%5
Crude fat 5%5
Moisture 10%5

These are one supplier's guaranteed minimums, except moisture, which is a maximum. That product also guarantees 5 billion live cells per gram and adds two enzymes. Other suppliers use other media and strains, so none of this transfers.5,6

Why it is in the bag

A trace additive sold for gut and breath

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

Labels list ingredients by weight, and this one usually sits near the end, below salt, so it is likely too little to change the food's protein, fat or fiber. Makers add it for its fermentation substances and the digestive or breath story they support, not for bulk. That job is unproven: dog trials tested named or blended preparations, not this generic line in a finished food.1,3,4,6,12

  1. 01

    Carries fermentation material

    The dried culture retains material from the growth medium and substances made during fermentation. A supplier can specify enzyme activity, metabolites, or viable cells where applicable.5,6,8

  2. 02

    Supports digestive marketing

    Named live Bacillus preparations changed stool measures in small dog trials. That gives manufacturers a digestive story, but those results do not transfer automatically to this unnamed dried product.3,4,9

  3. 03

    Supports breath claims

    A supplier tested a heat-inactivated blend containing this ingredient as a dog food topper. Its studies do not isolate this ingredient, and the opened sources give no commercial cost comparison.1,2

How much Dog trials fed 150 or 250 mg a day of a blend containing it; one livestock supplier suggests 1 to 3 lb per ton of swine feed.1,2,11

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

    It freshens a dog's breath

    Outruns the evidence

    Evidence

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

    In 2 supplier-run, 24-dog trials, a heat-inactivated blend containing this ingredient and a Pediococcus product lowered breath sulfur readings against placebo. Neither trial tested the Bacillus material alone or showed cleaner teeth.1,2

  2. Brands say

    It gives dogs firmer stools

    Outruns the evidence

    Evidence

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

    A 16-dog trial of a named live strain and a separate 16-dog live Bacillus blend trial improved stool measures. Neither tested this generic dried product. EFSA questioned the practical value of the named strain's changes.3,4,9

  3. Brands say

    It helps dogs digest more nutrients

    Outruns the evidence

    Evidence

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

    A 16-dog live strain trial found higher fat and carbohydrate digestibility. Another 16-dog live blend trial found no digestibility change. Neither result measures what this unspecified dried fermentation product does.3,4

  4. Brands say

    Its spores survive kibble processing

    Outruns the evidence

    Evidence

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

    Bacillus preparations may contain spores, but a dog breath trial deliberately heat-inactivated this fermentation product. FDA warns that some dry microbial products lack the viable cells they claim. The name alone verifies no surviving spores.1,7

  5. Owners say

    It treats a dog's diarrhea

    Outruns the evidence

    Evidence

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

    The cited stool trials enrolled healthy dogs, not dogs receiving diarrhea treatment. FDA treats disease treatment claims for direct-fed microbial products as drug claims. This ingredient line is no reason to treat diarrhea at home.3,4,7

Straight answers

What owners ask

  1. Q01

    Is it just filler?

    No

    Manufacturers use it for substances made during fermentation, not to bulk a recipe. Its name does not disclose an amount, so the ingredient line cannot tell you its nutrient contribution to the food.6

  2. Q02

    Does it contain live probiotics?

    Not guaranteed

    The US ingredient name describes production and drying, not a viable dose. A tested blend containing it had its cells inactivated. If live microbes are the selling point, look for a separate organizm and colony-forming unit guarantee.1,6,7

  3. Q03

    Should I choose food for this?

    No

    A promising ingredient name is less useful than evidence on the finished preparation. Ask for its strain or product identity, an applicable activity or live-count guarantee, and a dog trial using that preparation.3,6,7

Who uses it

Brands, best sellers and the company it keeps

Top brands, by foods that list it

  1. Wellness 57 / 118
  2. NutriSource 41 / 91
  3. Diamond 27 / 30
  4. Victor 20 / 26
  5. Taste of the Wild 16 / 21
  6. Holistic Select 15 / 16
  7. Zignature 14 / 46
  8. Health Extension 14 / 47
  9. Diamond Naturals 13 / 13
  10. Kirkland Signature 8 / 9

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

Plus 9 more brands.

Amazon best sellers that list it

  1. #8 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 Grain-Free Dry Dog Food
  3. #57 Wellness Complete Health Deboned Chicken & Oatmeal Dry Dog Food
  4. #72 Wellness Complete Health Small Breed Turkey & Oatmeal Dry Dog Food
  5. #78 Zignature Original Lamb Formula with Probiotics Grain-Free Dry Dog Food
  6. #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. Chicken Fat 61%
  2. Mixed Tocopherols 52%
  3. Dried Plain Beet Pulp 50%
  4. Peas 47%
  5. Chicken Meal 45%
  6. Flaxseed 45%
  7. Natural Flavor 36%
  8. Chicken 32%
  9. Oatmeal 30%
  10. Dried Yeast 26%
  11. Brown Rice 24%
  12. Lentils 21%

On the shelf

Foods that list Dried Bacillus Subtilis Fermentation Product

258 foods in our catalog list it. These 60 list it highest on the label.

Iams Advanced Health Healthy Digestion Dry Dog FoodIamsIams Advanced Health Healthy Digestion Dry Dog FoodDry // No. 14 on the labelTaste of the Wild Prey Turkey Limited Ingredient Recipe for Dogs Grain-Free Dry Dog FoodTaste of the WildTaste of the Wild Prey Turkey Limited Ingredient Recipe for Dogs Grain-Free Dry Dog FoodDry // No. 14 on the labelTaste of the Wild Prey Angus Beef Limited Ingredient Recipe for Dogs Grain-Free Dry Dog FoodTaste of the WildTaste of the Wild Prey Angus Beef Limited Ingredient Recipe for Dogs Grain-Free Dry Dog FoodDry // No. 14 on the labelDiamond Original Dry Dog FoodDiamondDiamond Original Dry Dog FoodDry // No. 14 on the labelDiamond>Care Diamond Care Sensitive Skin Formula Grain-Free Dry Dog FoodDiamond CareDiamond>Care Diamond Care Sensitive Skin Formula Grain-Free Dry Dog FoodDry // No. 15 on the labelDiamond Care Sensitive Skin Formula for Adult Dogs Grain-Free Dry Dog FoodDiamondDiamond Care Sensitive Skin Formula for Adult Dogs Grain-Free Dry Dog FoodDry // No. 15 on the labelDiamond Puppy All Life Stages Dry Dog FoodDiamondDiamond Puppy All Life Stages Dry Dog FoodDry // No. 15 on the labelDiamond>Care Diamond Care Rx Renal Formula Dry Dog FoodDiamond CareDiamond>Care Diamond Care Rx Renal Formula Dry Dog FoodDry // No. 16 on the labelWholeHearted Active Performance High-Protein Chicken & Rice Recipe Dry Dog FoodWholeHeartedWholeHearted Active Performance High-Protein Chicken & Rice Recipe Dry Dog FoodDry // No. 16 on the labelDiamond Care RX Renal Formula for Adult Dogs Dry Dog FoodDiamondDiamond Care RX Renal Formula for Adult Dogs Dry Dog FoodDry // No. 16 on the labelIams Advanced Health Mobility Support Dry Dog FoodIamsIams Advanced Health Mobility Support Dry Dog FoodDry // No. 17 on the labelWellness Core Bowl Boosters Functional Toppers Digestive Health Dog Food TopperWellnessWellness Core Bowl Boosters Functional Toppers Digestive Health Dog Food TopperTopper // No. 17 on the label
Show 48 more
Taste of the Wild Prey Trout Limited Ingredient Recipe for Dogs Grain-Free Dry Dog FoodTaste of the WildTaste of the Wild Prey Trout Limited Ingredient Recipe for Dogs Grain-Free Dry Dog FoodDry // No. 15 on the labelDiamond Premium All Life Stages Dry Dog FoodDiamondDiamond Premium All Life Stages Dry Dog FoodDry // No. 15 on the labelDiamond High Energy Adult Dry Dog FoodDiamondDiamond High Energy Adult Dry Dog FoodDry // No. 15 on the labelDiamond Performance All Life Stages Dry Dog FoodDiamondDiamond Performance All Life Stages Dry Dog FoodDry // No. 17 on the labelDiamond>Care Diamond Care Sensitive Stomach Formula Grain-Free Dry Dog FoodDiamond CareDiamond>Care Diamond Care Sensitive Stomach Formula Grain-Free Dry Dog FoodDry // No. 18 on the labelZignature Original Pork Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Pork Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 18 on the labelDiamond Care Sensitive Stomach Formula for Adult Dogs Grain-Free Dry Dog FoodDiamondDiamond Care Sensitive Stomach Formula for Adult Dogs Grain-Free Dry Dog FoodDry // No. 18 on the labelDiamond Maintenance Dry Dog FoodDiamondDiamond Maintenance Dry Dog FoodDry // No. 18 on the labelZignature Original Lamb Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Lamb Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 20 on the labelZignature Original Whitefish Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Whitefish Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 20 on the labelZignature Original Small Bites Lamb Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Small Bites Lamb Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 20 on the labelEagle Pack Power Adult Dry Dog FoodEagle PackEagle Pack Power Adult Dry Dog FoodDry // No. 20 on the labelZignature Original Catfish Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Catfish Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 21 on the labelZignature Original Duck Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Duck Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 21 on the labelZignature Original Venison Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Venison Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 21 on the labelZignature Original Salmon Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Salmon Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 21 on the labelTaste of the Wild Pacific Stream Canine Recipe with Smoked Salmon Grain-Free Dry Dog FoodTaste of the WildTaste of the Wild Pacific Stream Canine Recipe with Smoked Salmon Grain-Free Dry Dog FoodDry // No. 21 on the labelZignature Original Trout & Salmon Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Trout & Salmon Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 22 on the label4health with Wholesome Grains Large Breed Puppy Chicken Formula at Tractor Supply Co Dry Dog Food4health4health with Wholesome Grains Large Breed Puppy Chicken Formula at Tractor Supply Co Dry Dog FoodDry // No. 22 on the labelZignature Original Puppy Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Puppy Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 22 on the labelZignature Original Kangaroo Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Kangaroo Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 22 on the labelZignature Original Goat Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Goat Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 22 on the labelZignature Original Small Bites Trout & Salmon Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Small Bites Trout & Salmon Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 22 on the labelZignature Original Small Bites Kangaroo Formula with Probiotics Grain-Free Dry Dog FoodZignatureZignature Original Small Bites Kangaroo Formula with Probiotics Grain-Free Dry Dog FoodDry // No. 22 on the labelTaste of the Wild Pacific Stream Puppy Recipe with Smoked Salmon Grain-Free Dry Dog FoodTaste of the WildTaste of the Wild Pacific Stream Puppy Recipe with Smoked Salmon Grain-Free Dry Dog FoodDry // No. 22 on the labelEagle Pack Original Lamb Meal & Brown Rice Formula Adult Dry Dog FoodEagle PackEagle Pack Original Lamb Meal & Brown Rice Formula Adult Dry Dog FoodDry // No. 22 on the labelDiamond Naturals Grain-Free Wild-Caught Whitefish & Sweet Potato Formula Dry Dog FoodDiamondDiamond Naturals Grain-Free Wild-Caught Whitefish & Sweet Potato Formula Dry Dog FoodDry // No. 22 on the labelDiamond Pro89 Beef, Pork & Ancient Grains Formula for Adult Dogs Dry Dog FoodDiamondDiamond Pro89 Beef, Pork & Ancient Grains Formula for Adult Dogs Dry Dog FoodDry // No. 22 on the labelWholeHearted Healthy Benefits Weight Control Lamb and Pea Recipe Dry Dog FoodWholeHeartedWholeHearted Healthy Benefits Weight Control Lamb and Pea Recipe Dry Dog FoodDry // No. 23 on the labelWholeHearted Adult Small-Breed Chicken & Brown Rice Recipe with Whole Grains Dry Dog FoodWholeHeartedWholeHearted Adult Small-Breed Chicken & Brown Rice Recipe with Whole Grains Dry Dog FoodDry // No. 23 on the labelTaste of the Wild Appalachian Valley Small Breed Canine Recipe with Venison & Garbanzo Beans Grain-Free Dry Dog FoodTaste of the WildTaste of the Wild Appalachian Valley Small Breed Canine Recipe with Venison & Garbanzo Beans Grain-Free Dry Dog FoodDry // No. 23 on the labelNutriSource Small Bites Adult Chicken & Rice Recipe Dry Dog FoodNutriSourceNutriSource Small Bites Adult Chicken & Rice Recipe Dry Dog FoodDry // No. 23 on the labelEagle Pack Large & Giant Breed Puppy Dry Dog FoodEagle PackEagle Pack Large & Giant Breed Puppy Dry Dog FoodDry // No. 23 on the labelEagle Pack Reduced Fat Adult Dry Dog FoodEagle PackEagle Pack Reduced Fat Adult Dry Dog FoodDry // No. 23 on the labelEagle Pack Original Chicken Meal & Pork Meal Formula All Life Stages Dry Dog FoodEagle PackEagle Pack Original Chicken Meal & Pork Meal Formula All Life Stages Dry Dog FoodDry // No. 23 on the labelDiamond Naturals Grain-Free Cage-Free Chicken & Sweet Potato Formula Dry Dog FoodDiamondDiamond Naturals Grain-Free Cage-Free Chicken & Sweet Potato Formula Dry Dog FoodDry // No. 23 on the labelDiamond Naturals Grain-Free Pasture-Raised Beef & Sweet Potato Formula Dry Dog FoodDiamondDiamond Naturals Grain-Free Pasture-Raised Beef & Sweet Potato Formula Dry Dog FoodDry // No. 23 on the labelTaste of the Wild High Prairie Canine Recipe with Roasted Bison & Roasted Venison Grain-Free Dry Dog FoodTaste of the WildTaste of the Wild High Prairie Canine Recipe with Roasted Bison & Roasted Venison Grain-Free Dry Dog FoodDry // No. 24 on the labelWholeHearted Adult Small-Breed Beef & Brown Rice Recipe with Whole Grains Dry Dog FoodWholeHeartedWholeHearted Adult Small-Breed Beef & Brown Rice Recipe with Whole Grains Dry Dog FoodDry // No. 24 on the labelWholeHearted Lamb & Brown Rice Recipe with Whole Grains Dry Dog FoodWholeHeartedWholeHearted Lamb & Brown Rice Recipe with Whole Grains Dry Dog FoodDry // No. 24 on the labelTaste of the Wild Southwest Canyon Canine Recipe with Wild Boar Grain-Free Dry Dog FoodTaste of the WildTaste of the Wild Southwest Canyon Canine Recipe with Wild Boar Grain-Free Dry Dog FoodDry // No. 24 on the labelTaste of the Wild Pine Forest Canine Recipe with Venison & Legumes Grain-Free Dry Dog FoodTaste of the WildTaste of the Wild Pine Forest Canine Recipe with Venison & Legumes Grain-Free Dry Dog FoodDry // No. 24 on the labelKirkland Signature Nature’s Domain Turkey and Sweet Potato Grain-Free Dry Dog FoodKirkland SignatureKirkland Signature Nature’s Domain Turkey and Sweet Potato Grain-Free Dry Dog FoodDry // No. 25 on the label4health with Wholesome Grains Adult Large Breed + Mobility Chicken and Rice Dry Dog Food4health4health with Wholesome Grains Adult Large Breed + Mobility Chicken and Rice Dry Dog FoodDry // No. 25 on the labelKirkland Signature Nature’s Domain Turkey and Ancient Grains Dry Dog FoodKirkland SignatureKirkland Signature Nature’s Domain Turkey and Ancient Grains Dry Dog FoodDry // No. 25 on the labelKirkland Signature Nature’s Domain Salmon and Sweet Potato Formula Grain-Free Dry Dog FoodKirkland SignatureKirkland Signature Nature’s Domain Salmon and Sweet Potato Formula Grain-Free Dry Dog FoodDry // No. 25 on the labelKirkland Signature Nature’s Domain Puppy Formula Chicken & Pea Grain-Free Dry Dog FoodKirkland SignatureKirkland Signature Nature’s Domain Puppy Formula Chicken & Pea Grain-Free Dry Dog FoodDry // No. 25 on the labelTaste of the Wild Wetlands Canine Recipe with Roasted Fowl Grain-Free Dry Dog FoodTaste of the WildTaste of the Wild Wetlands Canine Recipe with Roasted Fowl Grain-Free Dry Dog FoodDry // No. 25 on the label

On labels as

Dehydrated bacillus subtilis fermentation product: what changes

One page covers every name. Here is what each label word adds, and whether it changes anything for your dog.

Dehydrated bacillus subtilis fermentation product

Matters for your dog No

Dehydrated Bacillus Subtilis Fermentation Product

What it means AAFCO's feed terms use dehydrated for material whose moisture was removed by heat. On this ingredient it describes how the culture was dried, nothing more. It promises no strain, live cell count or amount.

For your dog Nothing changes compared with the dried version. Either name describes the same fermentation material, and neither tells you whether live cells survived or how much is in the food. The drying word has no effect on list position.7,13

Sources

What we read

Checked October 1, 2026.

  1. 1 A Novel Postbiotic Reduces Canine Halitosis Animals, 2025 // Journal
  2. 2 Canine Halitosis Improved With a Postbiotic: A Validation Study Journal of Veterinary Dentistry, 2026 // Journal
  3. 3 Effect of Calsporin® (Bacillus subtilis C-3102) addition to the diet on faecal quality and nutrient digestibility in healthy adult dogs Journal of Applied Animal Nutrition, 2019 // Journal
  4. 4 Bacillus subtilis and Bacillus licheniformis reduce faecal protein catabolites concentration and odour in dogs BMC Veterinary Research, 2020 // Journal
  5. 5 Super B Sub 5B Spec Sheet American Biosystems, Inc., n.d. // Industry
  6. 6 Official Names and Definitions of Feed Ingredients AAFCO, 2025 // Regulator
  7. 7 CPG Sec. 689.100 Direct-Fed Microbial Products U.S. Food and Drug Administration, 1995 // Government
  8. 8 Canadian Feed Ingredients Table (CFIT) Canadian Food Inspection Agency, n.d. // Government
  9. 9 Safety and efficacy of Calsporin® (Bacillus subtilis DSM 15544) as a feed additive for dogs EFSA Journal, 2017 // Regulator
  10. 10 The power of probiotics Cornell University College of Veterinary Medicine, n.d. // University
  11. 11 Super B Sub spec sheet American Biosystems, Inc., 2025 // Industry
  12. 12 Animal Food Labeling and Pet Food Claims U.S. Food and Drug Administration, n.d. // Regulator
  13. 13 Forages and Roughages (definitions quoting the AAFCO 2017 Official Publication) Eric's Feed Bag, 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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