Microbiome Labs Fidospore
- Probiotic
- 30
- 1
- 1.4 ounces
- Better rated than 55%
A three-strain spore probiotic capsule for cats and dogs, meant as a daily digestive support supplement.
As an Amazon Associate, ProductDome may earn a commission from qualifying purchases made through links on this page.
How it ranks among the 129 probiotics we track
4.5★ across 91 Amazon ratings, Bayesian-smoothed toward the category average.
91 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
100+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 129 probiotics we track - how the scorecard works · full probiotics data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A spore-forming probiotic capsule for dogs and cats combining Bacillus subtilis HU58, Bacillus licheniformis SL-307 and Pediococcus acidilactici, flavored with grass-fed beef liver and sold as a 30-capsule supply.
Made by Microbiome Labs, this is positioned for gut and immune support. Spore-based strains are shelf-stable without refrigeration, which sets them apart from many standard probiotic forms.
- 3-strain spore probiotic blend
- Grass-fed beef liver flavor
- 30 capsules per bottle
- For cats and dogs
Who it's for
Owners managing occasional digestive upset in a dog or cat, or looking for ongoing gut support. Not a substitute for veterinary treatment of an active GI illness.
Strengths and trade-offs
Drawn from this product's published specifications.
- Targets both cats and dogs
- Spore-forming strains survive digestion better than standard probiotics
- Beef liver flavor for palatability
- 30 capsules is a short supply for ongoing daily use
- No dosing guidance included in the listing data
Performance notes
Spore-forming Bacillus strains survive stomach acid better than many non-spore probiotics, then activate further along the gut. Pediococcus acidilactici is added alongside the two Bacillus strains for broader coverage.
Specifications
| Brand | Microbiome |
|---|---|
| Model | 16020357018 |
| Dimensions & fit | |
| Item Weight | 1.4 ounces |
| Included components | |
| Unit Count | 30 |
| Included Components | Microbiome Labs FidoSpore - Dog & Cat Digestive Supplement - Bacillus Subtilis Spore Based Probiotic to Support Digestion & Gut Health - Grass Fed Beef Liver Flavored Probiotics for Dogs (30 Capsules) |
| Other details | |
| Number Of Items | 1 |
| Specific Uses For Product | Argentyn 23 Professional Silver First Aid Gel - 2 fl oz |
| Item Form | Capsule |
| Item Type Name | Microbiome Labs FidoSpore - Dog & Cat Digestive Supplement - Bacillus Subtilis Spore Based Probiotic to Support Digestion & Gut Health - Grass Fed Beef Liver Flavored Probiotics for Dogs (30 Capsules) |
| Flavor | Beef |
| Product Benefits | Gut Health for Dogs & Cats |
| Model Number | 16020357018 |
| Upc | 787790357018 |
| Manufacturer Part Number | 16020357018 |
| Asin | B086D5T48C |
| Target Species | Cat,Dog |
| Manufacturer | Microbiome Labs |
| Active Ingredients | Bacillus subtilis HU58, Bacillus licheniformis (SL-307), Pediococcus acidilactici |
| Best Sellers Rank | #30,371 in Pet Supplies (See Top 100 in Pet Supplies) #155 in Dog Probiotic Supplements |
| Customer Reviews | {'ratings_count': '91', 'stars': '4.5'} |
How it compares
This product against the closest alternatives we track in probiotics.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Microbiome Labs FidosporeThis product | 4.5 / 5 | 91 | 3.9 / 5 |
| Nutramax Proviable Probiotics for Dogs and CatsNutramax | 4.6 / 5 | 19,178 | 4.6 / 5 |
| Pro Plan Veterinary Diets FortiFlora Chewable Probiotic Tablets for Dogs and PuppiesPurina Pro Plan | 4.7 / 5 | 5,046 | 4.6 / 5 |
| Zesty Paws Probiotics for DogsZesty | 4.5 / 5 | 26,130 | 4.5 / 5 |
| Native Pet Pumpkin for DogsNative | 4.5 / 5 | 9,721 | 4.5 / 5 |
Similar probiotics from other brands
Questions about the Microbiome 16020357018
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What strains are in Fidospore?
Bacillus subtilis HU58, Bacillus licheniformis SL-307 and Pediococcus acidilactici.
Can cats take this too?
Yes, the listing states it targets both cats and dogs.
How many capsules are in one bottle?
30 capsules.