Summary
| French Bulldogs carry one of the highest burdens of gut-related disease of any breed. Their brachycephalic anatomy drives a 93% rate of gastrointestinal signs in clinically affected dogs,³ while their genetic predisposition to atopic dermatitis places the gut-skin axis at the centre of virtually every health concern their owners face.¹ The best gut health supplements for French Bulldogs address both vulnerabilities simultaneously: restoring microbiome balance, supporting the epithelial barrier, and modulating the immune response that drives skin inflammation. This guide identifies the specific supplements recommended for a French Bulldog, explains the science behind each recommendation, and provides practical guidance on how to use them together. Recommendations are anchored in evidence and reflect the formulation logic behind Bonza’s Biotics, Block, and Belly Bioactive Bites supplements. |
If you have spent any time in the company of a French Bulldog owner, you already know the particular shape their worry takes. It is rarely abstract. It is a dog scratching at its face at three in the morning. It is a vet visit that turns into three vet visits that turns into a prescription for antibiotics that works for a while and then stops working. It is the careful, exhausting management of a dog they are completely devoted to, while quietly wondering whether there is something they are missing.
The answer, increasingly, is the gut. French Bulldogs are not simply prone to skin problems or digestive sensitivity as isolated conditions. They are a breed in which the connection between gut health and whole-body wellbeing is unusually direct and unusually consequential. The dysbiosis, barrier dysfunction, and immune hyperreactivity that originate in the gastrointestinal tract are the upstream drivers of the scratching, the flares, and the recurrent infections that define the experience of owning this breed. Addressing the surface without addressing the gut is a cycle, not a solution.
This guide cuts through that cycle. As a canine nutritionist holding a Diploma in Canine Nutrition (Distinction) and a Diploma in Canine Nutrigenomics (Distinction), I will tell you directly which gut health supplements I would reach for first with a French Bulldog, why the evidence supports those choices, and how to build a protocol that addresses this breed’s vulnerabilities at their root.
Key Takeaways
- French Bulldogs carry a genetically high burden of gut dysbiosis, compounded by their brachycephalic anatomy, immune hyperreactivity, and frequent antibiotic exposure
- The gut-skin axis is the most clinically significant framework for this breed: microbiome imbalance drives epithelial barrier dysfunction and systemic immune activation, producing the skin flares and allergy burden Frenchie owners know well
- Calsporin® (Bacillus velezensis DSM 15544) is the only EFSA-authorised live spore-forming probiotic specifically for dogs, and it is the cornerstone of any French Bulldog gut supplement protocol⁵
- Biotics Bioactive Bites delivers the full Biotics Triad (prebiotics, probiotic, and postbiotics) in a single daily supplement, providing comprehensive microbiome support in one product
- Block Bioactive Bites addresses the gut-skin and gut-immune axis directly, targeting the skin flares and allergy burden that most Frenchie owners are actively managing
- For French Bulldogs with persistent digestive sensitivity, Belly Bioactive Bites provides targeted support as a complementary layer alongside Biotics
In This Guide
- Why French Bulldog Gut Health Drives Their Supplement Needs
- The Best Gut Health Supplements for French Bulldogs
- Best Probiotics for French Bulldog Gut Health
- Best Prebiotics for French Bulldogs
- Best Supplements for French Bulldog Skin Problems and Allergies
- How to Use These Supplements Together
- Safety, Dosage and When to See Your Vet
- Frequently Asked Questions
- Conclusion
- Related Articles
- References
Why French Bulldog Gut Health Drives Their Supplement Needs
French Bulldogs face gut health challenges from two converging directions, and understanding both is essential before any supplement decision makes sense.
The first is structural. Brachycephalic dogs are not simply dogs with flat faces; they are dogs whose anatomy creates a cascade of gastrointestinal consequences. Aerophagia, regurgitation, oesophageal dysmotility, hiatal hernia predisposition, and altered gut motility are all well-documented sequelae of brachycephalic obstructive airway syndrome.³ A retrospective study of 98 brachycephalic dogs found gastrointestinal signs in 93% of French Bulldogs presenting with airway syndrome, the highest prevalence of the three breeds studied.³ That structural turbulence creates a chronically disrupted gut environment, one that is perpetually fighting to maintain the microbial stability it needs to function.
The second vulnerability is immunological. French Bulldogs are one of a small number of breeds with confirmed worldwide predisposition to canine atopic dermatitis.¹ That predisposition is genetically driven and well-established across multiple independent epidemiological studies. The clinical expression is the one every Frenchie owner recognises: pruritic paws, lip fold and tail fold dermatitis, recurrent ear infections, and skin flares that cycle through periods of relative calm and periods of crisis. What is less immediately visible is the gut mechanism driving that pattern. Dysbiosis allows inflammatory metabolites and microbial components to breach the intestinal epithelial barrier, entering systemic circulation and triggering the immune hyperreactivity that manifests as what owners see on the skin.² The gut is not incidental to the skin problem; for this breed, it is the upstream cause.
A third compounding factor is antibiotic exposure. French Bulldogs receive antibiotics frequently, whether for skin infections, ear infections, or respiratory complications. Each course disrupts the microbiome further, creating a cycle of dysbiosis, immune hyperreactivity, and repeat infection that is difficult to break without actively supporting gut restoration post antibiotics.
This breed is also predisposed to granulomatous colitis, a severe inflammatory bowel condition associated with adherent-invasive Escherichia coli (AIEC) in young French Bulldogs, most commonly in dogs under one year of age.⁴ This condition is covered in detail in the companion Health Hub article on French Bulldog gut health. The supplement protocol described here is not a treatment for granulomatous colitis; it is a microbiome support strategy for the far more common chronic gut instability that affects the breed at large.
The gut-organ axes most relevant for French Bulldogs are the gut-skin axis (the primary clinical concern), the gut-immune axis (the mechanism behind immune hyperreactivity and allergy burden), and the gut-metabolic axis (particularly relevant in a breed prone to obesity and metabolic disruption). These three axes are addressed simultaneously by the protocol that follows.
The Best Gut Health Supplements for French Bulldogs
The supplement recommendations below are not a list of options to choose between. They are a sequenced protocol, each product addressing a specific layer of this breed’s gut vulnerability. Biotics is the foundation. Block is the targeted gut-skin layer. Belly is the acute digestive support for the subset of French Bulldogs with persistent digestive symptoms.
Biotics Bioactive Bites: The Microbiome Foundation
Biotics Bioactive Bites is the supplement I would reach for first with a French Bulldog, and it is the one I would maintain as the daily foundation of any gut health protocol for this breed.
The reason comes down to architecture. French Bulldogs need microbiome support that works across all three biotic layers simultaneously: prebiotics to feed and sustain beneficial bacteria, a probiotic that actually survives to reach the gut intact, and postbiotics that deliver functional bioactive effects independently of live bacterial colonisation. Biotics delivers all three in a single daily supplement, through a formulation I consider the most clinically relevant available for dogs.
The probiotic in Biotics is Calsporin® (Bacillus velezensis DSM 15544), the only live spore-forming probiotic with EFSA authorisation specifically for dogs.⁵ This matters for a French Bulldog for a straightforward reason: most conventional probiotic strains, including the Lactobacillus and Bifidobacterium preparations that dominate the supplement market, are heat-sensitive organisms that begin to degrade well before reaching the gut. Calsporin® forms a protective endospore coat that makes it heat-stable to at least 90°C, resistant to gastric acid and bile salts, and capable of surviving both the manufacturing process and canine gastrointestinal transit to germinate in the intestine where it is needed.⁵ For a breed receiving frequent antibiotics, the spore-forming mechanism is particularly valuable: it means microbiome support can be continued during and after antibiotic courses without compromising probiotic viability.
The postbiotic layer in Biotics includes two named preparations that operate through distinct mechanisms. L. helveticus HA-122 is a heat-inactivated (tyndallised) postbiotic whose surface-layer protein fraction has been shown to modulate immune responses at the gut epithelial level, reducing inflammatory signalling while supporting barrier integrity.⁷ TruPet™ is a standalone postbiotic with a specifically indole-rich metabolite profile. Clinical research has confirmed that an indole-rich postbiotic preparation reduced scratch frequency by 20% and improved owner-assessed pruritus scores by 27% in dogs compared to placebo, with the mechanism acting via aryl hydrocarbon receptor (AhR) activation, a direct and measurable gut-skin axis pathway.⁶ That makes TruPet™ particularly relevant for a breed in which itch and skin inflammation are the primary owner-facing concerns.
The prebiotic layer includes Fibrofos™ 60 (dried chicory root, minimum 60% inulin, from Cosucra) and Biolex® MB40 (brewer’s yeast cell wall concentrate providing mannan-oligosaccharides and beta-1,3/1,6-glucans, from Leiber GmbH). Inulin-type fructans from chicory root are among the most extensively studied prebiotics in canine nutrition, with demonstrated effects on faecal microbiota composition, short-chain fatty acid production, and beneficial bacterial populations.⁸ ⁹ The combination of fermentable inulin and yeast cell wall fractions addresses both the luminal microbial environment and gut-associated immune function.
For French Bulldogs specifically, Biotics is the supplement I would build the gut protocol around from day one.
Shop Biotics for French Bulldogs →
Block Bioactive Bites: Targeting the Gut-Skin Axis
If Biotics is the foundation, Block Bioactive Bites is the targeted layer that addresses what French Bulldog owners are most visibly trying to manage: the skin flares, the allergy-driven inflammation, and the immune hyperreactivity that makes this breed so demanding to own.
Block is formulated around the gut-skin and gut-immune axes. Its ingredient stack targets the downstream expression of microbiome imbalance specifically at the skin and immune level. Where Biotics works to restore and maintain the microbiome itself, Block works on the consequences of the microbiome’s dysfunction in a breed genetically predisposed to those consequences. The two products are complementary in function, not redundant.
The practical case for Block alongside Biotics in a French Bulldog is direct. A dog whose gut-skin axis is chronically activated needs both upstream microbiome support and targeted modulation of the inflammatory pathways that are already expressing. Block provides the latter. For owners managing a Frenchie through a skin flare cycle, through recurrent ear infections, or through the kind of persistent immune reactivity that conventional veterinary management addresses symptomatically rather than at root, Block represents the gut-facing complement to that management.
Block is not a replacement for veterinary treatment of active skin disease. It is a sustained gut-level support strategy for a breed in which skin and allergy problems are a near-universal reality. Used alongside Biotics, it addresses the primary gut-organ axis driving the conditions these owners live with.
Belly Bioactive Bites: for Persistent Digestive Sensitivity
Not every French Bulldog will need Belly alongside Biotics. For the subset of the breed presenting with pronounced digestive instability, however, it becomes the third layer of a complete gut support protocol.
Belly Bioactive Bites is the acute-to-ongoing digestive support supplement in the Bonza range. It is targeted at the symptoms most recognisable to owners of dogs with genuinely sensitive digestion: loose or inconsistent stools, gut rumbling, post-antibiotic disruption, and the kind of persistent GI instability that makes every dietary transition an anxious event. Given that French Bulldogs have a 93% rate of gastrointestinal signs in the clinically affected population³ and frequently cycle through antibiotic courses, there is a meaningful subset of the breed for whom Biotics alone is not sufficient to stabilise the digestive picture.
The clearest candidates for Belly alongside Biotics are French Bulldogs recovering from a course of antibiotics, those with a documented history of recurrent loose stools or sensitive digestion, and those whose brachycephalic GI sequelae include pronounced motility or fermentation issues. For these dogs, Belly provides the targeted digestive layer that Biotics, designed as a microbiome foundation rather than an acute GI remedy, is not designed to replace.
The Biotics Triad: Why Foundation Matters for French Bulldogs
The formulation logic behind Biotics rests on a principle worth making explicit: prebiotics, probiotics, and postbiotics work through distinct mechanisms, and their combination produces outcomes that exceed any single component.
Prebiotics feed the beneficial bacteria already present in the gut. Probiotics introduce specific, evidence-backed strains. Postbiotics deliver functional bioactive compounds, including immunomodulatory signals and barrier-supporting molecules, without depending on live bacterial colonisation. In a French Bulldog, whose microbiome is chronically disrupted by anatomy, antibiotics, and immune hyperreactivity, addressing only one layer of this system leaves the others unaddressed.
The Biotics Triad in Biotics Bioactive Bites is not a marketing category. It is a clinical decision about how to support a disrupted microbiome comprehensively. For this breed, that comprehensiveness is not optional.
Best Probiotics for French Bulldog Gut Health
The most important question when selecting a probiotic for a French Bulldog is not which strain to choose but which strain will actually survive to reach the gut. Most conventional probiotic supplements contain Lactobacillus or Bifidobacterium strains that are sensitive to heat, gastric acid, and the mechanical stress of manufacturing. A French Bulldog whose antibiotic-disrupted microbiome needs active restoration is poorly served by a probiotic preparation that degrades before it arrives.
The best probiotic for French Bulldog gut health is Calsporin® (Bacillus velezensis DSM 15544), a live spore-forming strain with EFSA authorisation specifically for dogs.⁵ Its spore-forming mechanism provides heat stability to at least 90°C, confirmed survival through gastric acid and bile salts, and guaranteed viability from manufacturing to the point of intestinal germination. These are not theoretical advantages; they are the specific properties that make a probiotic clinically reliable in a compromised gut environment.
Calsporin® is included at therapeutic concentration in Biotics Bioactive Bites. It is the only spore-forming probiotic strain with EFSA authorisation specifically for dogs, and it is the strain the evidence supports for a breed in which probiotic viability and microbiome restoration are genuine clinical priorities.
Best Prebiotics for French Bulldogs
Prebiotics support gut health by providing fermentable substrates that selectively feed beneficial bacteria, increase short-chain fatty acid production, and support the conditions for a healthier microbial balance. For a French Bulldog with a structurally and immunologically challenged gut, prebiotics provide the nutritional environment in which microbial recovery can actually take place.
The most well-evidenced prebiotic for dogs is inulin derived from chicory root.⁸ ⁹ Inulin-type fructans pass undigested to the large intestine, where they are fermented by beneficial bacteria including Bifidobacterium and Lactobacillus populations, producing short-chain fatty acids (SCFAs) that lower luminal pH, support colonocyte health, and reduce the conditions that favour pathogenic bacteria. Chicory root inulin has been shown to beneficially shift faecal microbiota composition and increase SCFA production in dogs.⁸ ⁹
Biotics Bioactive Bites provides inulin through Fibrofos™ 60 (minimum 60% inulin from Cosucra, the chicory specialist) alongside Biolex® MB40 (Leiber GmbH), which contributes mannan-oligosaccharides and beta-1,3/1,6-glucans from brewer’s yeast cell walls. The combination addresses both fermentable fibre-driven microbiota support and yeast-derived gut-immune modulation in a single prebiotic layer.
Best Supplements for French Bulldog Skin Problems and Allergies
Skin problems and allergies in French Bulldogs are gut problems with a skin presentation. That framing is not a simplification; it reflects the mechanistic reality of how dysbiosis drives the immune hyperreactivity that produces atopic flares in this breed.² Managing the skin without addressing the gut is treating the symptom in isolation from its cause.
The best supplement approach for French Bulldog skin problems and allergies combines Biotics Bioactive Bites as the gut foundation with Block Bioactive Bites as the targeted gut-skin layer. Biotics restores and maintains the microbiome environment; Block addresses the gut-skin and gut-immune axis expression that is already active. This two-layer approach targets the problem at both the upstream cause and the downstream expression.
The TruPet™ postbiotic in Biotics is particularly relevant here. Its indole-rich metabolite profile activates the aryl hydrocarbon receptor (AhR), a pathway that directly connects gut microbial activity to skin immune responses. In a randomised, double-blinded placebo-controlled clinical trial, an indole-rich postbiotic preparation reduced scratch frequency by 20% and improved pruritus scores by 27% in dogs compared to placebo.⁶ That is a measurable gut-skin axis effect, produced through the postbiotic layer of the supplement rather than through topical or systemic immune suppression.
For French Bulldogs with active skin disease under veterinary management, gut supplementation through Biotics and Block provides a sustained, root-level complement to whatever topical or systemic treatment is in place. It is not an alternative to veterinary care; it is the layer that addresses what veterinary management typically does not.
How to Use These Supplements Together
The three supplements below work as a sequenced protocol rather than a stack you introduce all at once. Follow these steps to build the protocol correctly for your French Bulldog.
- Start with Biotics Bioactive Bites as the daily foundation.
Give Biotics every day alongside food, following the body weight dosage on the label. French Bulldogs typically fall in the 8 to 15 kg range. Biotics is the permanent daily supplement for this breed — it is not a short course. Give it consistently for at least two to four weeks before assessing any changes in digestion or stool quality.
- Add Block Bioactive Bites two to four weeks after starting Biotics.
Do not introduce both products on the same day. Allow the Biotics Triad two to four weeks to begin stabilising the microbiome before adding Block. Once introduced, give Block daily alongside Biotics. Block is the sustained gut-skin and gut-immune axis layer; it is most effective when the microbiome foundation is already in place underneath it.
- Introduce Belly Bioactive Bites if digestive symptoms are present.
Not every French Bulldog needs Belly. Add it if your dog has loose or inconsistent stools, post-antibiotic digestive disruption, or a documented history of digestive sensitivity. Belly can be given continuously alongside Biotics or used for defined periods when symptoms are active — for example, during and for two to four weeks after an antibiotic course. It is not required as a permanent supplement for dogs with stable digestive function.
- During and after antibiotic courses, maintain Biotics throughout.
Calsporin® (Bacillus velezensis DSM 15544) forms a protective endospore that is not inactivated by antibiotics, unlike conventional probiotic strains. Continue giving Biotics daily during antibiotic treatment and for at least four to six weeks post-course to support full microbiome restoration. Add Belly for the two to four weeks immediately following the course if loose stools or digestive instability are present.
- Practical note:
All three supplements are delivered as Bioactive Bites soft chews. They can be given alongside food or as standalone treats, removing the practical difficulty of capsules or powders. The format makes daily supplementation straightforward for both the dog and the owner.
Safety, Dosage and When to See Your Vet
Biotics, Block, and Belly Bioactive Bites are food-grade supplements formulated for daily use in adult dogs. Follow the dosage guidance on each product label, which is calculated by body weight. French Bulldogs typically range from 8 to 15 kg; adjust dosage accordingly.
Calsporin® (Bacillus velezensis DSM 15544) has been assessed by EFSA as safe for dogs, their owners, and the environment, with no concerns identified regarding toxigenicity or antimicrobial resistance.⁵ Inulin at appropriate supplementation levels is well tolerated in dogs; as with any fibre-containing supplement, introduce gradually if your French Bulldog has a history of gas or bloating.
None of these supplements replaces veterinary diagnosis or treatment for active disease. If your French Bulldog is presenting with severe skin disease, unexplained weight loss, blood in the stool, vomiting, or any signs suggesting granulomatous colitis (haematochezia and chronic diarrhoea in a dog under two years of age), consult your vet before beginning a supplement protocol. Gut supplementation supports health; it does not substitute for clinical management.
If your dog is currently under veterinary management for atopic dermatitis or chronic inflammatory gut disease, discuss the addition of gut supplements with your vet. In most cases, Biotics and Block are compatible with ongoing veterinary treatment and may reduce the frequency and severity of flares over time.
Frequently Asked Questions
The best probiotic for French Bulldogs is Calsporin® (Bacillus velezensis DSM 15544), the only live spore-forming probiotic strain with EFSA authorisation specifically for dogs.⁵ Its spore-forming mechanism ensures it survives manufacturing, gastric acid, and bile salts to reach the intestine intact, which is the minimum requirement for clinical efficacy in a breed whose microbiome is frequently disrupted by antibiotics and structural GI instability. Calsporin® is included at therapeutic concentration in Bonza’s Biotics Bioactive Bites.
Shop Biotics Bioactive Bites →
Yes, and the mechanism is direct. French Bulldog skin problems and allergies are substantially driven by gut dysbiosis, epithelial barrier dysfunction, and immune hyperreactivity that originate in the gastrointestinal tract.² Gut supplementation with Biotics addresses this at the source; Block Bioactive Bites provides the targeted gut-skin and gut-immune axis support alongside it. Clinical evidence for TruPet™, the indole-rich postbiotic in Biotics, includes a 20% reduction in scratch frequency and a 27% improvement in pruritus scores in dogs versus placebo.⁶ These are measurable gut-skin axis outcomes produced through the supplement’s postbiotic layer.
Shop Block Bioactive Bites →
Most owners notice improvements in stool consistency and digestive stability within two to four weeks of starting Biotics. Skin and allergy-related improvements typically take longer because the gut-skin axis operates on a slower timescale than direct digestive function; four to eight weeks is a more realistic window for visible skin benefits. For post-antibiotic microbiome recovery, continue supplementation for at least four to six weeks after the course ends. Gut health support is a long-term strategy for this breed, not a short-term intervention.
Yes, if skin problems or allergies are present alongside gut sensitivity, which describes the majority of French Bulldogs. Biotics provides the microbiome foundation; Block provides the targeted gut-skin and gut-immune axis support. They work through complementary mechanisms and are designed to be used together. Introduce Biotics first, then add Block two to four weeks later to allow the microbiome to begin stabilising before the second layer is introduced.
Biotics is a microbiome foundation supplement providing the full Biotics Triad (prebiotics, a live spore-forming probiotic, and two postbiotic preparations). Belly is a targeted digestive support supplement for dogs with pronounced digestive sensitivity, loose stools, or post-antibiotic gut disruption. Most French Bulldogs benefit from Biotics as a permanent daily supplement; Belly is the additional layer for the subset of the breed with persistent digestive instability. They are compatible and can be used alongside each other.
Conclusion
French Bulldogs are not a difficult breed to supplement for; they are a breed for which the wrong supplement approach simply does not reach the problem. Surface-level skin management without gut support leaves the upstream cause of atopic inflammation unaddressed. Generic probiotics that do not survive manufacturing or gastric transit produce no meaningful microbiome effect. A supplement protocol that does not account for the full Biotics Triad misses the complementary mechanisms that make prebiotics, probiotics, and postbiotics more effective in combination than any single component alone.
The protocol I recommend for French Bulldogs starts with Biotics Bioactive Bites as the daily gut foundation, anchored in Calsporin® (Bacillus velezensis DSM 15544) as the only EFSA-authorised spore-forming probiotic for dogs, supported by the indole-rich postbiotic TruPet™ with its measured gut-skin axis effect, and grounded in a prebiotic layer that feeds the microbiome environment from which everything else follows. Block Bioactive Bites layers targeted gut-skin and gut-immune axis support on top of that foundation. Belly Bioactive Bites provides the digestive support layer for the subset of the breed that needs it.
This is the supplement protocol I would build for a French Bulldog. It is specific, it is evidence-backed, and it starts where the problem actually starts.
Shop Biotics Bioactive Bites for French Bulldogs →
Related Articles
- French Bulldog Gut Health: Why Their Gut Never Rests (parent Lamp Post article — link to be added on publication)
- The Gut-Skin Axis in Dogs: Why Skin Problems Start in the Gut
- Best Probiotics for Dogs: Canine Nutritionist’s Guide to Real Gut Impact
- The Biotics Triad: Bonza’s Three-Component Framework for Canine Gut Health
- Prebiotics vs Probiotics vs Postbiotics for Dogs: What Your Dog Actually Needs and Why
References
- Ryu JH, Kang JH, Kang YH, Kim MS, Kim HJ, Huh EA, Kim SH, Jeon JS, Hwang CY. Prevalence and lesion distribution of atopic dermatitis in small-to-medium breed dogs in Korea. Vet Dermatol. 2025;36(2):186–195. doi: 10.1111/vde.13329. PMID: 39936388.
- De Pessemier B, Grine L, Debaere M, Maes A, Paetzold B, Callewaert C. Gut-skin axis: current knowledge of the interrelationship between microbial dysbiosis and skin conditions. Microorganisms. 2021;9(2):353. doi: 10.3390/microorganisms9020353. PMID: 33670115. PMC: PMC7916842.
- Kaye BM, Rutherford L, Perridge DJ, Ter Haar G. Relationship between brachycephalic airway syndrome and gastrointestinal signs in three breeds of dog. J Small Anim Pract. 2018;59(11):670–673. doi: 10.1111/jsap.12914. PMID: 30094894.
- Manchester AC, Hill S, Sabatino B, Armentano R, Carroll M, Kessler B, Miller M, Dogan B, McDonough SP, Simpson KW. Association between granulomatous colitis in French Bulldogs and invasive Escherichia coli and response to fluoroquinolone antimicrobials. J Vet Intern Med. 2013 Jan-Feb;27(1):56-61. doi: 10.1111/jvim.12020. Epub 2012 Dec 3. PMID: 23206120.
- EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP); Rychen G, Aquilina G, Azimonti G, Bampidis V, Bastos ML, Bories G, Chesson A, Cocconcelli PS, Flachowsky G, Gropp J, Kolar B, Kouba M, López Puente S, López-Alonso M, Mantovani A, Mayo B, Ramos F, Villa RE, Wallace RJ, Wester P, Brozzi R, Saarela M. Safety and efficacy of Calsporin® (Bacillus subtilis DSM 15544) as a feed additive for dogs. EFSA J. 2017;15(4):e04760. doi: 10.2903/j.efsa.2017.4760. PMID: 32625462. PMC: PMC7009994. Note: The 2017 opinion uses the former taxonomic designation Bacillus subtilis DSM 15544. The strain was reclassified as Bacillus velezensis DSM 15544 in 2020 and the reclassification became legally binding via EU Regulation 2022/307. The strain itself is unchanged.
- Sordillo A, Heldrich J, Turcotte R, Sheth RU. An Indole-Rich Postbiotic Reduces Itching in Dogs: A Randomized, Double-Blinded Placebo-Controlled Study. Animals (Basel). 2025 Jul 9;15(14):2019. doi: 10.3390/ani15142019. PMID: 40723482; PMCID: PMC12291873.
- Nikapitiya, C., Jayasinghe, J.N.C., Madhawa Dias, M.K.H. et al. Identification of immunomodulating properties of postbiotics from lactobacilli using the zebrafish (Danio rerio) model. BMC Vet Res 22, 1 (2026). doi: 10.1186/s12917-025-05159-z.
- Pinna C, Biagi G. The utilisation of prebiotics and synbiotics in dogs. Ital J Anim Sci. 2014;13(1):169–178. doi: 10.4081/ijas.2014.3107.
- Pilla R, Suchodolski JS. The Role of the Canine Gut Microbiome and Metabolome in Health and Gastrointestinal Disease. Front Vet Sci. 2020 Jan 14;6:498. doi:10.3389/fvets.2019.00498. PMID: 31993446; PMCID: PMC6971114.
Editorial Information
| Field | Detail |
|---|---|
| Published | April 2026 |
| Last Updated | April 2026 |
| Reviewed by | Glendon Lloyd, Diploma in Canine Nutrition (Distinction), Diploma in Canine Nutrigenomics (Distinction) |
| Next Review | April 2027 |
| Author | Glendon Lloyd |
| Disclaimer | This article is for informational purposes only and does not constitute veterinary advice. Always consult a qualified veterinarian before making changes to your dog’s diet or supplement regimen. |
