Animal Biome - Doggy Biome S. boulardii + FOS Powder

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Available in 30 g or 60 g sizes - choose your size before adding to cart!

DoggyBiome™ S. boulardii + FOS Powder, with active ingredients Saccharomyces boulardii and Fructooligosaccharides (FOS), rebalances and improves your dog’s digestive health. We recommend mixing the powder into your dog’s food at mealtime.



      • Improves stools frequency
      • Reduces diarrhea (including antibiotic-caused diarrhea)
      • Promotes healthy skin
      • Combats yeast overgrowth
      • Supports gut function by nourishing beneficial bacteria
      • Recommended by veterinarians

About Saccharomyces boulardii

S. boulardii is a special probiotic that’s a strain of yeast, not bacteria. Studies have shown that S. boulardii is safe and effective for dogs and that it can prevent and reduce diarrhea from multiple causes. It has anti-inflammatory properties. As a probiotic, it is especially helpful for regrowing gut microbe populations that have become imbalanced and for promoting healthy skin.

And unlike bacterial probiotics, S. boulardii isn’t affected by antibiotics, so it can also be used during antibiotic treatment to help with the digestive side effects that antibiotics often cause. Studies have shown that when S. boulardii is given along with an antibiotic, dogs are much less likely to develop diarrhea during or after the course of medication.

S. boulardii is also resilient to stomach acid, so when it reaches the intestines, it’s still intact and alive, while many bacterial probiotics die in the stomach and never make it to the gut. Once in the gut, S. boulardiiprovides food for beneficial microbes, supporting a healthy, diverse microbiome.

About Fructooligosaccharides (FOS)

Fructooligosaccharides (FOS) are tiny, soluble fibers. The raw material from which the FOS in our S. boulardii + FOS is produced is Non-GMO beet sugar*. These particular fibers are prebiotic, meaning that they are the preferred food of beneficial microbes like the ones in your pet’s gut. Making sure all the beneficial members of the gut microbiome get enough of the right food is crucial not just for healthy digestion but also for a strong immune system, healthy skin, and even a happy mood. Studies in dogs have shown that supplementation with FOS improves both gut health and immune functions.


The 30g jar contains a 0.6g scoop. Give 1 scoop per day for dogs weighing 11-20 lbs, and 2 scoops per day for dogs weighing 21-35 lbs.

Caution: S. boulardii can cause constipation in some dogs. Discontinue use if your dog's stool becomes hard and dry.


A 30g jar comes with a 0.6g scooper. Each 0.6g scoop of powder contains 6.6 Billion CFUs of active Saccharomyces boulardii and 225 mg of Fructooligosaccharides (FOS).

A 60g/6oz jar comes with a 1.2g scooper. Each 1.2g scoop of powder contains 13.2 Billion CFUs of active Saccharomyces boulardii and 450 mg of Fructooligosaccharides (FOS). Each 60g jar has 30 servings for dogs weighing up to 50 pounds.

60g Jar:
Active Ingredients Per 1.2g Scoop
Saccharomyces boulardii - 13.2 Billion CFUs
Fructooligosaccharides (FOS) - 450 mg

Other Ingredients: None

30g Jar:

Active Ingredients Per 0.6g Scoop
Saccharomyces boulardii - 6.6 Billion CFUs
Fructooligosaccharides (FOS) - 225 mg

Other Ingredients: None

Allergens: No Soy, No Grains/Wheat, No Corn, No Artificial Colors, No Artificial Flavors, No Artificial Preservatives.

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Animal Biome - Doggy Biome...

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30 g