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Gastric Ulcer Support for Horses: Top 5 Options in Canada for 2025 — Veterinarian-Reviewed Guide to Relief, Prevention and Long-Term Gut Health

Published on Thursday, August 21, 2025

Formulations aimed at preventing and soothing equine gastric ulcers through buffering agents, mucosal protectants, and targeted ingredients like pectin-lecithin complexes are increasingly popular in Canada. Trending products combine acid buffering with microbiome-friendly additives and management-focused guidance for long-term gastric health. Canadian horse owners and professionals tend to choose products that balance clinical evidence, ease of administration (paste, pellet, or feed-through), proven active ingredients, and availability through farm stores, feed suppliers, or veterinary channels. Preferences also reflect practical concerns: horses in performance or high-stress environments often need stronger medical intervention, while leisure and pasture-kept horses typically benefit from preventive daily supplements and management changes such as increased forage and reduced acidity triggers.

Quick Menu

1. Best Daily Feed-Through Buffer

2. Best Microbiome & Mucosa Support

3. Best Veterinary Conditioning Program

4. Best Fast-Acting Prescription Antacid

5. Best Hindgut pH Buffer

1
BEST DAILY FEED-THROUGH BUFFER

Purina Outlast Gastric Support Supplement

Purina Outlast Gastric Support Supplement

Purina Outlast earns a best-in-class position for gastric ulcer support in horses by delivering a continuous, palatable feed-through supplement that helps stabilize gastric pH and coat the stomach lining. It is often chosen for its broad availability and cost-effective, day-to-day management compared with single-use pharmaceuticals like UlcerGard, while offering a simpler, lower-cost alternative to premium, customized programs such as Mad Barn's Visceral+.

4.3
★★★★☆
  • Lining support — time-tested

  • Daily pH balance — oat-sweet

  • Lining support — time-tested

  • Daily pH balance — oat-sweet

Review Summary

86%

"Users commonly report consistent reduction in gastric upset when fed daily, praising palatability and ease of use; some note it takes weeks to see benefit and a minority of horses do not respond."

  • Stable routine aid — easy-scoop

  • Designed as a daily feed-through supplement to help stabilize gastric pH during regular training and travel.

  • Stable routine aid — easy-scoop

  • Designed as a daily feed-through supplement to help stabilize gastric pH during regular training and travel.

Increased Safety & Security

Time-Saving Convenience

Purina Outlast earns a best-in-class position for gastric ulcer support in horses by delivering a continuous, palatable feed-through supplement that helps stabilize gastric pH and coat the stomach lining. It is often chosen for its broad availability and cost-effective, day-to-day management compared with single-use pharmaceuticals like UlcerGard, while offering a simpler, lower-cost alternative to premium, customized programs such as Mad Barn's Visceral+.

  • Lining support — time-tested

  • Daily pH balance — oat-sweet

  • Stable routine aid — easy-scoop

  • Designed as a daily feed-through supplement to help stabilize gastric pH during regular training and travel.

  • Formulated to be palatable and easy to top-dress onto grain or feed for consistent use.

  • Lining support — time-tested

  • Daily pH balance — oat-sweet

  • Stable routine aid — easy-scoop

  • Designed as a daily feed-through supplement to help stabilize gastric pH during regular training and travel.

  • Formulated to be palatable and easy to top-dress onto grain or feed for consistent use.

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$60-120 CAD

2
BEST MICROBIOME & MUCOSA SUPPORT

Mad Barn Visceral+ Gastric Support

Mad Barn Visceral+ Gastric Support
🏠 Local Product

Mad Barn Visceral+ stands out as a market leader for its research-driven, multi-ingredient approach aimed at both gastric and microbiome health, backed by personalized feeding guidance and lab-based diagnostics. Though typically positioned at a higher price point than commodity supplements like Purina Outlast, its technical advantage is a targeted, science-focused formulation and individualized recommendations that can outperform one-size-fits-all options for horses with complex digestive profiles.

4.6
★★★★☆
  • Mucosal care — probiotic zing

  • Absorption boost — lab-smarts

  • Mucosal care — probiotic zing

  • Absorption boost — lab-smarts

Review Summary

90%

"Customers frequently report noticeable improvement in gastric comfort and appetite and appreciate the ingredient transparency; a few cite the price and occasional variable response between horses."

  • Feed-safe blend — unflavored wink

  • Concentrated formula aimed at supporting gastric mucosal health and overall digestive tract balance.

  • Feed-safe blend — unflavored wink

  • Concentrated formula aimed at supporting gastric mucosal health and overall digestive tract balance.

Increased Safety & Security

Time-Saving Convenience

Mad Barn Visceral+ stands out as a market leader for its research-driven, multi-ingredient approach aimed at both gastric and microbiome health, backed by personalized feeding guidance and lab-based diagnostics. Though typically positioned at a higher price point than commodity supplements like Purina Outlast, its technical advantage is a targeted, science-focused formulation and individualized recommendations that can outperform one-size-fits-all options for horses with complex digestive profiles.

  • Mucosal care — probiotic zing

  • Absorption boost — lab-smarts

  • Feed-safe blend — unflavored wink

  • Concentrated formula aimed at supporting gastric mucosal health and overall digestive tract balance.

  • Contains targeted nutrients and supportive ingredients intended for daily management of ulcer-prone horses.

  • Mucosal care — probiotic zing

  • Absorption boost — lab-smarts

  • Feed-safe blend — unflavored wink

  • Concentrated formula aimed at supporting gastric mucosal health and overall digestive tract balance.

  • Contains targeted nutrients and supportive ingredients intended for daily management of ulcer-prone horses.

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$80-140 CAD

3
BEST VETERINARY CONDITIONING PROGRAM

Succeed Digestive Conditioning Program

Succeed Digestive Conditioning Program

Succeed is a market-leading conditioning program that emphasizes a systematic, evidence-based protocol to strengthen mucosal health and digestive resilience rather than relying solely on ingredients. It provides a measurable, programmatic advantage—often used by performance barns and trainers—making it more of a clinical conditioning investment than a daily low-cost supplement, and it is typically used in concert with short-term pharmaceuticals like UlcerGard for acute cases.

4.2
★★★★☆
  • Microbiome balance — slow-release

  • Digestive conditioning — trainer-fave

  • Microbiome balance — slow-release

  • Digestive conditioning — trainer-fave

Review Summary

82%

"Owners and trainers often report good short-term improvement in digestive comfort and performance when used as directed, though results can vary by horse and many mention the program cost."

  • Fiber-focused mix — palatable nibble

  • Structured multi-week conditioning program combining targeted supplements to rehabilitate gut integrity.

  • Fiber-focused mix — palatable nibble

  • Structured multi-week conditioning program combining targeted supplements to rehabilitate gut integrity.

Increased Safety & Security

Time-Saving Convenience

Succeed is a market-leading conditioning program that emphasizes a systematic, evidence-based protocol to strengthen mucosal health and digestive resilience rather than relying solely on ingredients. It provides a measurable, programmatic advantage—often used by performance barns and trainers—making it more of a clinical conditioning investment than a daily low-cost supplement, and it is typically used in concert with short-term pharmaceuticals like UlcerGard for acute cases.

  • Microbiome balance — slow-release

  • Digestive conditioning — trainer-fave

  • Fiber-focused mix — palatable nibble

  • Structured multi-week conditioning program combining targeted supplements to rehabilitate gut integrity.

  • Focuses on both stomach and hindgut support with ingredients intended to promote mucosal repair and microbial stability.

  • Microbiome balance — slow-release

  • Digestive conditioning — trainer-fave

  • Fiber-focused mix — palatable nibble

  • Structured multi-week conditioning program combining targeted supplements to rehabilitate gut integrity.

  • Focuses on both stomach and hindgut support with ingredients intended to promote mucosal repair and microbial stability.

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$250-350 CAD

4
BEST FAST-ACTING PRESCRIPTION ANTACID

UlcerGard Oral Paste

UlcerGard Oral Paste

UlcerGard is the go-to pharmaceutical option for acute gastric ulcer treatment because its omeprazole paste delivers rapid and reliable acid suppression under veterinary guidance. Its technical superiority for short-term healing makes it more expensive and prescription-dependent than preventive feed supplements such as Purina Outlast or Equishure, but it is essential when ulcers are diagnosed or when immediate medical intervention is required.

4.8
★★★★☆
  • Rapid acid control — vet-grade paste

  • Clinical treatment — single-dose hero

  • Rapid acid control — vet-grade paste

  • Clinical treatment — single-dose hero

Review Summary

94%

"Widely regarded as the most effective on-label treatment for active gastric ulcers, users praise its predictable, rapid improvement; complaints center on cost and prescription access."

  • Easy dosing tube — barn-easy

  • Oral omeprazole paste providing rapid acid suppression for treatment and short-term prevention of gastric ulcers.

  • Easy dosing tube — barn-easy

  • Oral omeprazole paste providing rapid acid suppression for treatment and short-term prevention of gastric ulcers.

Increased Safety & Security

Time-Saving Convenience

UlcerGard is the go-to pharmaceutical option for acute gastric ulcer treatment because its omeprazole paste delivers rapid and reliable acid suppression under veterinary guidance. Its technical superiority for short-term healing makes it more expensive and prescription-dependent than preventive feed supplements such as Purina Outlast or Equishure, but it is essential when ulcers are diagnosed or when immediate medical intervention is required.

  • Rapid acid control — vet-grade paste

  • Clinical treatment — single-dose hero

  • Easy dosing tube — barn-easy

  • Oral omeprazole paste providing rapid acid suppression for treatment and short-term prevention of gastric ulcers.

  • Single-dose, syringe-applied formulation that is widely used by veterinarians for clinical cases.

  • Rapid acid control — vet-grade paste

  • Clinical treatment — single-dose hero

  • Easy dosing tube — barn-easy

  • Oral omeprazole paste providing rapid acid suppression for treatment and short-term prevention of gastric ulcers.

  • Single-dose, syringe-applied formulation that is widely used by veterinarians for clinical cases.

Order Now

$50-120 CAD

5
BEST HINDGUT PH BUFFER

Equishure Hindgut Buffer

Equishure Hindgut Buffer

Equishure Hindgut Buffer is recognized for addressing hindgut acidity and fermentation balance—a complementary, cost-efficient strategy to gastric-focused products—making it valuable for long-term management and as an adjunct to acid-suppressant therapies. Its niche technical advantage is stabilizing the hindgut environment (reducing risk of secondary hindgut acidosis) where products like UlcerGard do not act, and it typically offers a lower daily cost compared with premium, diagnostics-driven programs.

3.9
★★★☆☆
  • Hindgut buffering — beet-wink

  • pH stabilization — steady-ride

  • Hindgut buffering — beet-wink

  • pH stabilization — steady-ride

Review Summary

74%

"Some owners see reduced hindgut acidity and improved manure quality, but many report inconsistent results and occasional palatability issues for picky eaters."

  • Forage-friendly mix — tail-wagging

  • Specifically formulated to help buffer hindgut acidity after high-starch meals or heavy exercise.

  • Forage-friendly mix — tail-wagging

  • Specifically formulated to help buffer hindgut acidity after high-starch meals or heavy exercise.

Increased Safety & Security

Time-Saving Convenience

Equishure Hindgut Buffer is recognized for addressing hindgut acidity and fermentation balance—a complementary, cost-efficient strategy to gastric-focused products—making it valuable for long-term management and as an adjunct to acid-suppressant therapies. Its niche technical advantage is stabilizing the hindgut environment (reducing risk of secondary hindgut acidosis) where products like UlcerGard do not act, and it typically offers a lower daily cost compared with premium, diagnostics-driven programs.

  • Hindgut buffering — beet-wink

  • pH stabilization — steady-ride

  • Forage-friendly mix — tail-wagging

  • Specifically formulated to help buffer hindgut acidity after high-starch meals or heavy exercise.

  • Powdered product that mixes into feed and is intended for daily or around-training use to support hindgut microbes.

  • Hindgut buffering — beet-wink

  • pH stabilization — steady-ride

  • Forage-friendly mix — tail-wagging

  • Specifically formulated to help buffer hindgut acidity after high-starch meals or heavy exercise.

  • Powdered product that mixes into feed and is intended for daily or around-training use to support hindgut microbes.

Order Now

$60-120 CAD

What the Research Says About Equine Gastric Ulcer Support

Veterinary research supports a layered approach to gastric ulcer care: medical acid suppression for active lesions, protective and mucosal-supporting ingredients to complement healing, and nutritional or management interventions for long-term prevention. The following plain-language summaries reflect common, evidence-informed findings from equine clinical trials and university studies.

Omeprazole-based treatments (the active in products like UlcerGard) reliably reduce gastric acidity and have been shown in clinical trials to promote healing of squamous gastric ulcers within a 2 to 4 week treatment window when used as directed.

Pectin-lecithin complexes and similar mucosal protectants can form a protective surface layer and, when used with buffering strategies, help reduce irritation; several studies show improved gastric comfort and reduced lesion scores when these agents are part of a broader program.

Dietary buffering agents and increased forage reduce periods of low pH in the stomach; research consistently finds management changes (more frequent feeding, higher forage, fewer high-starch meals) are as important as any supplement for prevention.

Probiotics and microbiome-friendly additives can support hindgut health and may help mitigate secondary digestive upset associated with ulcer treatments; evidence is growing but varies by strain and formulation.

Hindgut buffers (products like Equishure) address fermentation and acidosis in the large intestine, which is complementary to gastric-focused treatments and can reduce rebound digestive problems after acid-suppression therapy.

Comprehensive programs that combine medical treatment, protective supplements, and management adjustments (for example, the Succeed Digestive Conditioning Program or tailored regimens with Purina Outlast or Mad Barn Visceral+) show better long-term outcomes than single-mode interventions alone.

In Canada in 2025, a pragmatic, evidence-informed mix of products and management remains the best route to reduce ulcer risk and support healing. The five options highlighted on this page — Purina Outlast Gastric Support Supplement, Mad Barn Visceral+ Gastric Support, Succeed Digestive Conditioning Program, UlcerGard Oral Paste, and Equishure Hindgut Buffer — each play distinct roles: UlcerGard Oral Paste is the preferred option for veterinarian-guided medical treatment of active ulcers, while Purina Outlast, Mad Barn Visceral+, Succeed, and Equishure are strong choices for prevention, conditioning, and hindgut support. I hope you found what you were looking for; if you want to narrow choices by administration style, price, or veterinary recommendations, use the search to refine or expand your results.

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