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Top 5 Equine Digestive & Probiotic Supplements in Canada 2025: A Vet-Reviewed Guide to Hindgut Health, Colic Risk Reduction, and Better Feed Efficiency

Published on Monday, August 25, 2025

Probiotics, prebiotics, buffering agents, and digestive enzymes formulated to support hindgut health, reduce colic risk, and improve feed efficiency have become essential tools for Canadian horse owners and professionals in 2025. This category covers products designed for routine gut support and short-term use during stressors such as travel, competition, diet transitions, or antibiotic recovery. Canadian buyers often favor transparent labeling, scientifically informed formulations, stability in cold climates, and convenient formats like powders, pellets, or pastes. Practical considerations in the market include strain-specific evidence, guaranteed counts at expiry, palatability for picky eaters, and packaging sizes suitable for single-horse or barn-wide use. Overall, these supplements appeal because they help maintain consistent digestion, protect hindgut microbial balance when management changes occur, and can support overall performance and condition with fewer disruptions to daily routines.

Quick Menu

1. Best Comprehensive Digestive Supplement

2. Best for Gastric Ulcer Support

3. Best Acute Toxin Binder

4. Best Multi‑Strain Probiotic Paste

5. Best Value Daily Maintenance

1
BEST COMPREHENSIVE DIGESTIVE SUPPLEMENT

Mad Barn Optimum Digestive Health

Mad Barn
🏠 Local Product

Mad Barn’s Optimum Digestive Health earns best-in-class recognition for its research-backed multi-strain probiotic, prebiotic and enzyme combination that targets both foregut and hindgut balance; its formulation is technically advanced compared with single-strain or yeast-only options on the market. The product’s lab-driven profile and measurable ingredient list justify a premium price per dose, making it attractive for owners prioritizing validated gut-health outcomes over lower-cost, less-characterized alternatives.

4.3
★★★★☆

  • Daily gut balance

  • Clinically backed strains

  • Daily gut balance

  • Clinically backed strains

Review Summary

87%

"Users report noticeable improvements in manure consistency and reduced digestive upset after regular use, praising the targeted ingredient profile and flexible dosing; a minority note the product is relatively expensive or needs mixing for picky eaters."

  • Subtle molasses hint

  • Multi‑strain probiotic and prebiotic blend to support hindgut microbial balance

  • Subtle molasses hint

  • Multi‑strain probiotic and prebiotic blend to support hindgut microbial balance

Enhanced Physical Well-Being

Time-Saving Convenience

Mad Barn’s Optimum Digestive Health earns best-in-class recognition for its research-backed multi-strain probiotic, prebiotic and enzyme combination that targets both foregut and hindgut balance; its formulation is technically advanced compared with single-strain or yeast-only options on the market. The product’s lab-driven profile and measurable ingredient list justify a premium price per dose, making it attractive for owners prioritizing validated gut-health outcomes over lower-cost, less-characterized alternatives.

  • Daily gut balance

  • Clinically backed strains

  • Subtle molasses hint

  • Multi‑strain probiotic and prebiotic blend to support hindgut microbial balance

  • Includes digestive enzymes and yeast to aid fiber fermentation and nutrient absorption

  • Daily gut balance

  • Clinically backed strains

  • Subtle molasses hint

  • Multi‑strain probiotic and prebiotic blend to support hindgut microbial balance

  • Includes digestive enzymes and yeast to aid fiber fermentation and nutrient absorption

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From 91.99$
2
BEST FOR GASTRIC ULCER SUPPORT

Purina Outlast Gastric Support Supplement

Purina

Purina Outlast Gastric Support is the market leader thanks to Purina’s extensive distribution, veterinary relationships and a well-known gastric-buffering formula suited for everyday management; while it may not offer the same multi-strain microbial diversity as niche specialist products, its broad availability and proven efficacy make it a practical, cost-effective choice for many barns. The brand’s scale delivers financial advantages in pricing and supply reliability compared with smaller manufacturers.

4.4
★★★★☆

  • Ulcer-focused formula

  • Chewable horse-friendly

  • Ulcer-focused formula

  • Chewable horse-friendly

Review Summary

88%

"Widely recommended for managing gastric discomfort and reducing ulcer-related behaviors, reviewers commonly see calmer feeding and fewer recurrent symptoms, though many caution it is not a standalone cure and can be costly for long-term use."

  • Fast gastric relief

  • Buffered formula designed to help raise and stabilize stomach pH between meals

  • Fast gastric relief

  • Buffered formula designed to help raise and stabilize stomach pH between meals

Enhanced Physical Well-Being

Time-Saving Convenience

Purina Outlast Gastric Support is the market leader thanks to Purina’s extensive distribution, veterinary relationships and a well-known gastric-buffering formula suited for everyday management; while it may not offer the same multi-strain microbial diversity as niche specialist products, its broad availability and proven efficacy make it a practical, cost-effective choice for many barns. The brand’s scale delivers financial advantages in pricing and supply reliability compared with smaller manufacturers.

  • Ulcer-focused formula

  • Chewable horse-friendly

  • Fast gastric relief

  • Buffered formula designed to help raise and stabilize stomach pH between meals

  • Intended for daily feeding to reduce gastric acidity and support ulcer management

  • Ulcer-focused formula

  • Chewable horse-friendly

  • Fast gastric relief

  • Buffered formula designed to help raise and stabilize stomach pH between meals

  • Intended for daily feeding to reduce gastric acidity and support ulcer management

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$80-120 CAD

3
BEST ACUTE TOXIN BINDER

BioStar EQ Biosponge

BioStar

BioStar EQ Biosponge is positioned as a specialized acute-use product focused on adsorption and rapid mitigation of gastric irritants, making it the preferred emergency or short-term intervention in equine digestive care rather than a long-term microbiome modulator. Its technical advantage is a high-surface-area adsorbent designed for quick action, and it is typically priced competitively for single-use effectiveness that complements ongoing probiotic regimens from other brands on this list.

4.1
★★★★☆

  • Toxin adsorption

  • Rapid colic support

  • Toxin adsorption

  • Rapid colic support

Review Summary

82%

"Owners and veterinarians use Biosponge for acute toxin-related diarrhea and colitis with many reporting rapid improvement and reduced systemic signs; results are more variable for chronic digestive issues and some horses require repeated dosing."

  • Dust-free dosing

  • Bentonite clay‑based adsorbent formulated to bind toxins and excess fluid in the gut

  • Dust-free dosing

  • Bentonite clay‑based adsorbent formulated to bind toxins and excess fluid in the gut

Enhanced Physical Well-Being

Time-Saving Convenience

BioStar EQ Biosponge is positioned as a specialized acute-use product focused on adsorption and rapid mitigation of gastric irritants, making it the preferred emergency or short-term intervention in equine digestive care rather than a long-term microbiome modulator. Its technical advantage is a high-surface-area adsorbent designed for quick action, and it is typically priced competitively for single-use effectiveness that complements ongoing probiotic regimens from other brands on this list.

  • Toxin adsorption

  • Rapid colic support

  • Dust-free dosing

  • Bentonite clay‑based adsorbent formulated to bind toxins and excess fluid in the gut

  • Commonly used short‑term for diarrhea, toxin exposure or acute digestive upset

  • Toxin adsorption

  • Rapid colic support

  • Dust-free dosing

  • Bentonite clay‑based adsorbent formulated to bind toxins and excess fluid in the gut

  • Commonly used short‑term for diarrhea, toxin exposure or acute digestive upset

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$45-90 CAD

4
BEST MULTI‑STRAIN PROBIOTIC PASTE

Omega Alpha Biotic 8 Plus

Omega Alpha

Omega Alpha Biotic 8 Plus delivers a veterinary-grade, multi-strain probiotic blend with stability and dosing designed for clinical settings, offering a middle ground between boutique research-focused supplements and mass-market formulas. Although it often carries a higher sticker price than entry-level products, its emphasis on strain diversity, shelf stability and vet-focused quality can reduce long-term waste and deliver consistent outcomes for performance horses and clinics.

4
★★★★☆

  • Multi-strain blend

  • Digestive immunity boost

  • Multi-strain blend

  • Digestive immunity boost

Review Summary

80%

"Biotic 8 Plus is often credited with quickly normalizing foal and adult manure and improving appetite when used as directed, while a portion of users mention inconsistent palatability or needing multiple courses for lasting effect."

  • Syringe-friendly dose

  • Contains multiple targeted probiotic strains to help re‑establish healthy gut microflora

  • Syringe-friendly dose

  • Contains multiple targeted probiotic strains to help re‑establish healthy gut microflora

Enhanced Physical Well-Being

Skill Development & Mastery

Omega Alpha Biotic 8 Plus delivers a veterinary-grade, multi-strain probiotic blend with stability and dosing designed for clinical settings, offering a middle ground between boutique research-focused supplements and mass-market formulas. Although it often carries a higher sticker price than entry-level products, its emphasis on strain diversity, shelf stability and vet-focused quality can reduce long-term waste and deliver consistent outcomes for performance horses and clinics.

  • Multi-strain blend

  • Digestive immunity boost

  • Syringe-friendly dose

  • Contains multiple targeted probiotic strains to help re‑establish healthy gut microflora

  • Available as an oral paste for easy administration during stress, antibiotic therapy or dysbiosis

  • Multi-strain blend

  • Digestive immunity boost

  • Syringe-friendly dose

  • Contains multiple targeted probiotic strains to help re‑establish healthy gut microflora

  • Available as an oral paste for easy administration during stress, antibiotic therapy or dysbiosis

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$70-130 CAD

5
BEST VALUE DAILY MAINTENANCE

Martin's Premium Equi-Gestion

Martin's Premium

Martin's Premium Equi-Gestion is a value-oriented digestive supplement that combines buffering agents and live cultures for everyday support, making it an economical choice for recreational horses and large stables. While it may not match the breadth of strains or the clinical validation of top-tier formulations, its accessible pricing and straightforward dosing provide reliable baseline benefits for owners on a budget or those supplementing large numbers of animals.

3.9
★★★☆☆

  • Fiber digestion aid

  • Live yeast support

  • Fiber digestion aid

  • Live yeast support

Review Summary

78%

"Many purchasers praise Equi-Gestion for easing intermittent colic signs and supporting digestion at a reasonable price, though a subset report limited benefit for severe or long-standing gastrointestinal conditions."

  • Molasses-sweetened scoop

  • Balanced prebiotic and probiotic components formulated for everyday digestive maintenance

  • Molasses-sweetened scoop

  • Balanced prebiotic and probiotic components formulated for everyday digestive maintenance

Enhanced Physical Well-Being

Time-Saving Convenience

Martin's Premium Equi-Gestion is a value-oriented digestive supplement that combines buffering agents and live cultures for everyday support, making it an economical choice for recreational horses and large stables. While it may not match the breadth of strains or the clinical validation of top-tier formulations, its accessible pricing and straightforward dosing provide reliable baseline benefits for owners on a budget or those supplementing large numbers of animals.

  • Fiber digestion aid

  • Live yeast support

  • Molasses-sweetened scoop

  • Balanced prebiotic and probiotic components formulated for everyday digestive maintenance

  • Pelleted supplement designed to support manure consistency and overall feed efficiency

  • Fiber digestion aid

  • Live yeast support

  • Molasses-sweetened scoop

  • Balanced prebiotic and probiotic components formulated for everyday digestive maintenance

  • Pelleted supplement designed to support manure consistency and overall feed efficiency

Order Now

$60-120 CAD

What the Research Says About Equine Probiotics, Prebiotics, Buffers, and Enzymes

Scientific research and field studies indicate that targeted digestive support can help stabilize the intestinal environment, aid fiber digestion, and reduce symptoms linked to digestive upset in horses. Work to date includes controlled trials, observational studies, and laboratory analyses that examine how specific probiotic strains, prebiotic fibers, buffering agents, and enzyme blends affect fermentation, pathogen load, and nutrient availability. While evidence quality and outcomes vary by product and study design, consistent themes point to measurable benefits when products are well-formulated, dosed correctly, and used as part of a broader management plan.

Probiotics: Selected yeast and bacterial strains (for example, Saccharomyces and Lactobacillus groups in some studies) have been associated with improved fiber digestion and more stable hindgut fermentation in trials. Benefits are strain specific, so look for products listing genus, species, and CFU counts at expiry.

Prebiotics: Mannan oligosaccharides (MOS) and fructooligosaccharides (FOS) can support beneficial microbes and may reduce pathogen adhesion in the gut, according to multiple in vitro and in vivo studies.

Buffering agents: Products that moderate hindgut and gastric pH can reduce the risk of acidosis during high-starch meals or abrupt feed changes. Research supports strategic use of buffers during known risk periods, though long-term use should follow veterinary guidance.

Digestive enzymes: Supplemental amylase, protease, and cellulase can enhance nutrient breakdown in older horses or during dietary transitions, improving apparent digestibility in several controlled feeding studies.

Clinical outcomes: Field studies and practice reports show reduced incidence of loose manure, quicker recovery after antibiotic courses, and fewer performance interruptions when digestive support is integrated early. High-quality randomized controlled trials are fewer, and results vary by formulation and management context.

Quality and regulation: Variability in commercial products is a common finding across reviews. Important quality markers include third-party lab testing, clear strain and dose declarations, expiration-stable CFU guarantees, and manufacturing standards. Always consult a veterinarian before starting supplements, especially for horses with a history of colic or metabolic conditions.

In Canada in 2025, balancing scientific backing with practical barn needs is key when choosing digestive support for horses. The top options covered here — Mad Barn Optimum Digestive Health, Purina Outlast Gastric Support Supplement, BioStar EQ Biosponge, Omega Alpha Biotic 8 Plus, and Martin's Premium Equi-Gestion — each address different use cases from everyday hindgut maintenance to acute buffering and toxin binding. For most Canadian owners seeking a research-informed, broadly applicable option with clear labeling and strong support, Mad Barn Optimum Digestive Health stands out as the best single starting point. We hope you found the guidance you needed; refine or expand your search using the site search to compare ingredient lists, formats, and dosing for your horse's specific needs.

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