All joints are important, but when it comes to your four-legged friend’s performance, no joint is more critical than the Sacroiliac (SI) joint. 

Allowing for movement to happen, the SI joint in horses can’t afford to become injured or impaired. It’s like the wind in a horse’s proverbial sails, and when it’s not functioning properly, you’re bound to have an unhappy, poorly performing horse on your hands.

That’s why we’ve got the details on taking good care of the SI joint in horses, how to spot SI pain in horses, and what exactly you can do to help prevent SI injury in horses.

Ready to get started? Let’s stop horsing around and get into it!

Key Takeaways

• The SI joint is essential for performance, acting as a force-transfer hub that converts hind-end power into forward movement, collection, and balance.

• SI injuries are often subtle, rarely causing obvious swelling or acute lameness, which makes early recognition and diagnosis challenging.

• Pain can stem from the joint or its supporting ligaments, and even mild instability can lead to chronic discomfort and compensatory movement patterns.

• Sport and performance horses are at higher risk, especially in disciplines that demand repeated hind-end engagement like dressage, jumping, and eventing.

• Prevention and management require a multi-pronged approach, including proper conditioning, balanced nutrition, controlled exercise, and targeted joint support.

• Addressing inflammation, cartilage health, and mobility together is key to protecting long-term SI joint function and keeping horses comfortable and performing at their best.

What is SI Injury in Horses?

An SI injury in horses refers to damage or dysfunction of the sacroiliac (SI) joint or the ligaments that stabilize it. Because the SI joint is designed primarily for stability rather than large ranges of motion, injury typically results in pain, reduced performance, and long-term instability rather than obvious swelling or visible lameness.

Role of the Equine SI Joint

The SI joint plays a central role in how a horse moves and performs. Its primary functions include:

• Converting power generated by the hind limbs into forward motion

• Supporting efficient movement during running, jumping, collection, and gait transitions

• Transferring energy through the body rather than creating large movement itself

In this way, the SI joint functions much like a motor—essential for performance, but vulnerable when overstressed or destabilized.

Location

The sacroiliac joint is located deep within the pelvis, where the sacrum (a group of fused vertebrae at the base of the spine) meets the ilium, one of the main pelvic bones. Its depth and surrounding musculature make it difficult to directly visualize or palpate during a physical exam.

Stability

Unlike highly mobile joints, the SI joint has a very limited range of motion and depends heavily on ligamentous support. Stability is maintained by three key ligaments:

1. Dorsal sacroiliac ligament

2. Ventral sacroiliac ligament

3. Sacrotuberous ligament

Because stability is prioritized over mobility, even minor disruption to these structures can significantly impact comfort and performance.

Causes of SI Pain in Horses 

SI pain in horses can develop for several reasons, but most cases stem from either direct injury or long-term wear on the joint and its supporting structures. Trauma, poor biomechanics, and repetitive strain can all compromise the stability of the sacroiliac region, while degenerative conditions and compensatory movement patterns often worsen the problem over time. Understanding these underlying causes is key to identifying SI pain early and preventing it from progressing into a chronic, performance-limiting issue.

SI Joint Injuries

Anytime your horse’s SI joint is injured itself, or its surrounding ligaments and structures are, it can cause back trouble for your favourite companion. This includes things like suspensory ligament injuries, as these structures work closely together. 

Generally, these injuries and strains can happen through:

• Development of osteoarthritis in the joint or surrounding structures

• Trauma from a fall

• Fractures and sprains

• Injuries caused by overstretching or excessive exertion

• Sacroiliac ligament desmitis

• Pain or injury to the stifle area

• Poor posture caused by rider position, hoof balance or saddle fit

Whether it is a secondary injury to the ligaments around the horse SI joint or the joint itself that seems to be injured, be sure to call a vet in to check on your horse if you witness an accident or traumatic injury to avoid long-term pain and problems. 

Degenerative Conditions 

In addition to acute trauma, SI pain is commonly linked to degenerative conditions such as osteoarthritis. This is particularly true in older horses or those subjected to repetitive, high-intensity workloads. Osteoarthritis develops when joint surfaces become damaged, leading to inflammation, stiffness, and discomfort caused by friction between compromised structures.

SI pain may also be associated with other hind limb conditions, including locking stifle or sacroiliac ligament desmitis. When pain exists elsewhere in the hindquarters, horses often compensate by shifting weight or altering their movement patterns. Over time, this compensation places additional strain on the SI joint, increasing the risk of further injury and contributing to chronic discomfort.

Risk in Sport Horses

Sport horses are particularly vulnerable to SI joint problems. Disciplines that place repeated demands on the hindquarters include:

• Dressage

• Eventing

• Show jumping

These activities increase the load transferred through the SI joint, which can contribute to:

• Inflammation

• Ligament stress

• Gradual decline in joint stability and performance

SI Pain in Horses

When your horse has SI pain, you need to consider degenerative conditions caused by wear and tear just as much as acute trauma.

What we're talking about here is arthritis. Osteoarthritis occurs when the joints become inflamed, resulting in pain and stiffness for your equine pal. It occurs in older horses and those used for strenuous performance. Inflammation can result from injuries or infections that damage the bone surface. As a result of the friction between these damaged surfaces, your horse feels great discomfort. Joint supplements for horses can be helpful in both preventing and reducing the symptoms of arthritis. 

Additionally, SI pain in horses can be associated with other hind limb injuries or conditions like locking stifle or sacroiliac ligament desmitis. To alleviate pressure on the other hindquarters where pain may be present, a lame horse will often compensate or carry weight differently, leading to more wear and tear on their SI joint, and potential injury. 

Symptoms of SI Pain in Horses

You need to be on the lookout for the signs of SI pain in horses. Because the sacroiliac joint plays such a central role in movement and power transfer, even subtle changes can signal a developing issue. Early recognition is especially important for both leisure and sport horses, as untreated SI pain can quickly progress into chronic performance and soundness problems.

When you suspect an SI injury in your horse, look for the following symptoms:

• Sensitive to touch or pressure on the lower back: Horses with SI pain may react defensively when their lower back or croup is touched, brushed, or saddled. This sensitivity can range from mild flinching to more obvious pain responses such as dipping away, tail swishing, or pinned ears.

• Stiff muscles around the SI joint: Muscle stiffness often develops as the horse attempts to protect the painful joint. Over time, this tension can limit flexibility and reduce the horse’s ability to engage the hindquarters properly during work.

• A shorter hind leg stride: SI pain commonly causes a reduction in stride length behind, as the horse avoids fully loading or extending the affected side. This shortened step may be more noticeable during transitions, circles, or collected movements.

• Gait resembling “bunny hopping” or skipping: Some horses move both hind legs together or display an uneven, skipping motion when the SI joint is painful. This abnormal gait reflects difficulty stabilizing the pelvis during movement.

• Dragging of the hind leg toes: Toe dragging may occur when the horse struggles to lift and swing the hind limb forward efficiently. Over time, this can lead to uneven hoof wear or scuffing marks visible on arena footing.

• Sudden or chronic lameness in one or more legs: SI pain can present as either an acute onset of lameness or a persistent, low-grade issue that worsens with work. Because the pain originates deep in the pelvis, lameness may shift between hind legs or appear inconsistent.

• Gait coordination problems: Horses with SI discomfort may appear unbalanced or uncoordinated, particularly during tight turns or complex movements. These coordination issues are often more obvious under saddle than when the horse is moving freely.

• Deterioration of muscle mass in the hindquarters and rump: Chronic SI pain can lead to visible muscle atrophy as the horse avoids fully engaging affected muscles. Loss of topline or uneven development between the hindquarters is a common red flag.

• Hunter’s bump that is disproportionately prominent or unbalanced: A pronounced or asymmetrical hunter’s bump may indicate chronic SI instability or ligament strain. While not always painful on its own, changes in size or symmetry can suggest an underlying problem.

• Favouring one hind leg when standing and shifting weight to compensate: Horses with SI pain often rest one hind leg more frequently or shift weight between legs when standing. This compensatory behaviour reduces discomfort but places additional strain on other joints.

• Kneecaps that click or lock: Clicking or locking of the stifle can occur alongside SI pain due to altered hind limb mechanics. These issues often develop as the horse compensates for instability in the pelvis.

• Using the wrong lead leg or being reluctant to strike off: Difficulty choosing or maintaining the correct lead can indicate pain during engagement or push-off. Horses may resist canter transitions altogether if striking off aggravates the SI joint.

• Inability to hold up the hind leg for shoeing: Standing on one hind leg requires pelvic stability, which can be painful for horses with SI issues. Resistance during farrier work is often one of the earliest practical signs owners notice.

• Skin that is tender, itchy, and inflamed: Increased sensitivity or irritation over the SI region can be caused by inflammation or muscle tension beneath the skin. Horses may react strongly to grooming or rubbing in this area.

• Sweating in patches: Uneven or patchy sweating may occur due to altered muscle use or nerve involvement. This symptom is often seen during exercise and may be more noticeable on the hindquarters or back.

• Turning the tail to one side: A consistently crooked tail carriage can reflect discomfort or imbalance in the pelvis. This subtle sign is often overlooked but can be an important indicator of SI dysfunction.

As with anything out of the ordinary for your horse, be sure to contact a veterinarian if you notice unusual behaviours or symptoms. Early evaluation allows for timely intervention and can significantly improve your horse’s comfort, performance, and long-term joint health.

Diagnosing Equine SI Joint Problems

Diagnosing SI joint problems in horses can be challenging due to the fact that the joint is located deep in the body and has a limited range of motion (making it tougher to detect problematic movement). Unlike more superficial joints, SI pain rarely presents with obvious swelling or a clear, isolated lameness. As a result, veterinarians typically rely on a combination of clinical assessment, diagnostic analgesia, and advanced imaging to build an accurate picture of what’s happening within the pelvis.

How Veterinarians Diagnose SI Joint Issues (Step-by-Step)

Because the SI Joint sits deep within the pelvis, there isn’t one single “gold standard” test that definitively confirms sacroiliac dysfunction. In practice, vets diagnose SI problems by ruling out other causes of hind-end lameness and combining multiple findings from the exam, diagnostic analgesia (nerve blocks), and imaging.

1. History + performance complaint triage: The vet starts by documenting when the issue shows up (under saddle vs. in-hand), what work triggers it (collection, transitions, jumping), and whether there was a fall, slip, or training change. This helps distinguish a primary SI problem from compensatory pain patterns.

2. Full lameness exam to rule out more common hind-limb sources: Since SI pain often mimics hock, stifle, or soft-tissue injuries, vets typically work “from the ground up” with a standard hind-limb lameness evaluation before labelling the SI as the main culprit. The goal here is to identify (or exclude) more accessible, more common pain generators first.

3. Palpation + functional assessment of the back and pelvis: The vet assesses topline muscle symmetry, pain responses over the pelvis and lumbosacral region, and how the horse moves through the back. This step matters because functional assessment is still a cornerstone of SI diagnosis, given the limitations of direct access to the joint.

4. Diagnostic analgesia (nerve blocks / periarticular anesthesia): If earlier steps point toward the SI region, the vet may use periarticular anesthesia (often discussed generally as “blocks” in client-facing language) to see whether numbing targeted regions improves gait quality or performance signs. These blocks can be helpful, but interpretation is cautious because the SI region is complex and local anesthetics can affect nearby structures.

5. Ultrasound evaluation of the sacroiliac region: Ultrasonography is commonly used as part of the diagnostic workup, especially to assess the surrounding soft tissues (including ligaments) and look for asymmetry or structural change consistent with injury. Ultrasound findings are typically interpreted alongside the clinical exam and response to analgesia—not as a standalone “yes/no” test.

6. Additional imaging when needed (often to improve confidence or rule out other pelvic pathology): When the diagnosis is still uncertain—or when the horse is high value / high performance—vets may recommend advanced imaging. The review notes that SI diagnosis has historically incorporated scintigraphy alongside ultrasound and periarticular anesthesia, and that computed tomography (CT) is a promising modality for evaluating bony structures of the SI region.

7. Synthesis + “working diagnosis” (and then monitoring response to a targeted plan): Because SI dysfunction is often diagnosed using a combination of findings (and because injection targeting can disperse beyond the SI region), vets typically arrive at a working diagnosis and then monitor whether a targeted rehab/treatment plan produces the expected improvement pattern. 

What Is the “Pelvic Tilt” Test for Horses?

The pelvic tilt test is a clinical assessment technique used to evaluate the symmetry and mobility of the pelvis and can provide indirect insight into SI joint dysfunction. During the test, a veterinarian applies controlled pressure to specific points on the horse’s pelvis or asks the horse to perform movements that encourage pelvic engagement.

In a healthy horse, the pelvis should respond evenly and smoothly. Horses with SI joint problems may show restricted movement, uneven tilting, or a delayed response on one side. While the pelvic tilt test does not provide a definitive diagnosis on its own, it can highlight asymmetries that warrant further investigation. Because SI joint issues are rarely identified through a single test, the pelvic tilt assessment is typically used alongside gait evaluation, nerve blocks, and imaging such as ultrasound. Together, these diagnostic tools help veterinarians distinguish SI joint problems from other hind-end conditions and develop a more targeted, effective management strategy.

SI Joint in Horses Prevention 

Who wouldn’t want to prevent their equine companion from the painful symptoms of SI joint pain in horses? 

That’s why we’ve gathered up the best things to add to your toolkit that can help prevent SI pain in horses, and how they work to make sure your horse is feeling good and performing as normal. 

Equine Joint Supplements 

Ensuring your horse’s joints are strong and healthy is not only beneficial to the prevention of SI pain in horses, but also to their overall health and performance. 

Think of it as a house. When the foundation and structure of a house, often called “the bones”, is strong and well-maintained, the rest of the home will be less likely to become damaged or in disrepair. The same goes for a horse. When their internal support systems, like the SI joint and its supporting ligaments, are well taken care of, your horse will be happier and healthier. 

Consider using joint supplements with these ingredients to help support your horse’s overall joint health:

Each of these ingredients plays a part in helping to alleviate the painful symptoms of SI pain in horses. 

With seemingly endless choices on the market, however, how do you know which equine joint supplement is most beneficial to your horse? 

You can start by learning how to read a supplement label. That way, you know exactly what you should look for in a supplement. 

Any supplement worth its salt should:

• Contains glucosamine, chondroitin, MSM, and even hyaluronic acid

• Offer a small, easy-to-serve therapeutic dose

• Have zero fillers

• Have been tested by a third party, has been approved by Health Canada, and is designated as a Veterinary Health Product (VHP)

One supplement that meets these strict criteria, and even better, exceeds them, is Integricare's TRI-ACTA line of products. TRI-ACTA offers high-quality ingredients that support the health of SI joints in horses, without breaking the bank. Plus, our maximum strength TRI-ACTA H.A. supplement contains hyaluronic acid, which is beneficial for joint fluid and mobility. 

TRI-ACTA H.A. for Equine

Our maximum strength formula is perfect for horses that are ageing, experiencing arthritis and stiffness, are in training and competition, or under a heavy workload.

Learn More

Balanced Nutrition 

A balanced equine diet is the ticket to good overall health, and that includes the maintenance of the SI joint in horses.

When a horse experiences nutritional deficiencies, problems can arise that cause everything from acute symptoms to chronic pain and lasting problems. 

For example, a horse that is deficient in critical vitamins like A, C, D, thiamine, riboflavin, or B12 can begin to experience symptoms such as:

• Changes and deficiencies in vision and eye health

• Increased sensitivity to pneumonia due to a weakened immune system

• An increase in appetite

• Progressive weakness of muscles

• Changes in their hooves

• Skeletal muscle damage

• Joint pain and swelling

In order to prevent a deficiency, you should be sure you understand what exactly is required in a horse's diet, and what happens when that element of their diet is missing.

The table below shows the key parts of a horse’s diet, and why it’s important to both overall and SI joint health in horses. 

Controlled Exercise 

Training with a horse to prevent SI pain is focused on developing its hind muscles. Each exercise should be focused on getting the horse to pick up their feet in a normal arc when they take a step forward. By supporting the development of strong muscles in their pelvis and upper hind limb, you can ensure their SI joint is also well supported. 

Some commonly used exercises to develop the horse’s hindquarters include:

• Exercises that improve flexibility and relieve tension

• Walking on a water treadmill

• Training with trotting poles and leg weights

• Strengthening supporting muscles with lunging aids

• Work on transitions under the saddle (walk to trot, trot to canter)

• Repeatedly hacking uphill, backwards, on small inclines 

Be sure to consult with a vet or other horse pro, as an equine physical therapist, before you begin working on exercises like these. It’s important to establish if your horse has any current problems or SI pain to be aware of. That way, you can ensure the treatment plan for your horse is safe and effective. After all, you wouldn’t want to make your horse suffer further pain by choosing inappropriate exercises.

SI Joint in Horses Treatment Options

When prevention isn’t enough, due to existing injuries, the conformation of your horse, or the presence of arthritis, you need to know how you can treat SI pain in horses. 

Thankfully, SI joint problems in horses are common, and there are plenty of solutions to ease their pain. 

Just make sure you talk to your vet about what is going to be best for your horse specifically, before diving into any of these options. 

SI Injections in Horses

SI injections in horses can provide your equine friend with targeted pain relief as you seek other techniques to heal their joints.

An injection into the sacroiliac joint typically contains both steroids and hyaluronic acid to treat both pain and mobility issues. Prior to administering injections, equine veterinarians usually administer a pain reliever and sedative together to ensure your horse is comfortable. A veterinarian will likely prescribe phenylbutazone to horses as part of the pre-operative procedure in order to keep them comfortable following SI injections in horses. 

Both right and left joints may have to be injected, depending on the severity of your horse's SI joint pain. In other cases, dealing with one joint at a time is sufficient. Your vet will be able to assess this, as well as if more injections could help further reduce symptoms.

Horses respond best to SI injections when they are combined with rest, physiotherapy, and supplements. Simply injecting them won't solve all their problems. If you don't address the true cause of SI pain in horses, you will encounter the same challenges again and again.

How Much Are Horse SI Injections?

The cost of SI injections can vary widely depending on location, imaging guidance, sedation requirements, and whether one or both joints are treated. The table below provides typical high-level cost ranges seen in Canada and the United States.

Table sources: 1, 2, 3, 4

Note: Costs increase if both SI joints are injected, advanced imaging is required, or multiple follow-up treatments are recommended.

NSAIDs

Non-steroidal anti-inflammatory drugs are probably the most common medications used to treat SI pain in horses. NSAIDs are different from other anti-inflammatory drugs that contain steroids, including all cortisone compounds. One of the most common NSAIDs used in horses is phenylbutazone, also called bute. 

Bute and other NSAIDs block inflammatory enzymes, which help reduce the symptoms of SI pain in horses. It can be a fast, effective treatment for severe pain caused by trauma to the SI joint itself or the surrounding structures. 

NSAIDs in equine medicine are only available by prescription from your veterinarian and do carry some risks if used incorrectly. Long-term use or incorrect dosages and administration can lead to gastrointestinal issues, even in otherwise healthy horses. Be sure to follow the prescribed instructions from your vet, and don't be afraid to pick up the phone if you begin to notice any out-of-the-ordinary behaviour from your horse.

Equine Joint Supplements

Equine joint supplements are not only an important part of preventing SI joint problems—they are also an essential component of treatment and long-term management once SI pain is present. While therapies like injections and NSAIDs help control inflammation and discomfort, joint supplements like TRI-ACTA H.A. (includes hyaluronic acid for added joint lubrication) work at a structural level to support joint healing and durability.

The foundation of effective equine joint supplements is glucosamine and chondroitin, two compounds that play a direct role in cartilage health. 

• Glucosamine supports the production and repair of cartilage by supplying the building blocks needed to maintain joint tissue

• Chondroitin helps strengthen cartilage and protect it from further breakdown. 

Together, these ingredients improve the joint’s ability to withstand ongoing mechanical stress—an essential factor for the SI joint, which bears heavy loads during movement and performance. TRI-ACTA also includes Methylsulfonylmethane (MSM), a natural anti-inflammatory, to further help with pain and swelling.

In cases of SI pain, joint supplements help address more than just symptoms. By supporting cartilage repair, improving joint resilience, and slowing degeneration, they contribute to improved comfort, mobility, and long-term stability. When used consistently alongside rest, rehabilitation, and veterinary-directed therapies, equine joint supplements provide ongoing support that helps prevent reinjury and promotes lasting soundness.

TRI-ACTA H.A. for Equine

Our maximum strength formula is perfect for horses that are ageing, experiencing arthritis and stiffness, are in training and competition, or under a heavy workload.

Learn More

Surgery

Surgical treatment for SI joint problems in horses is rare and typically reserved for severe cases where conservative management has failed. Because the SI joint is deep within the pelvis and surrounded by critical structures, surgical intervention is complex and carries significant risk.

In select cases involving pelvic fractures or severe instability, surgical stabilization may be considered. However, most horses with SI joint pain are managed successfully through a combination of injections, rehabilitation, controlled exercise, and long-term joint support rather than surgery.

For this reason, surgery is generally viewed as a last resort, and decisions are made on a case-by-case basis in consultation with a referral veterinarian or equine surgeon.

Rest

You may think it sounds strange, but rest is one of the best ways to help reduce symptoms of SI pain in horses. Even if you're pursuing other treatments and medication, rest is an essential component of their treatment plan.

Rest helps reduce inflammation and stress on the joints. Typically, a minimum of one week is recommended to help reduce the symptoms your horse is experiencing. It can help other treatments like SI injections for horses work more effectively, as they are not creating further damage while resting. Especially if horses are involved in a performance sport like jumping where their sacroiliac joint is regularly stressed, their bodies need time to recover. Be sure to ask your vet what amount of rest would be best for your equine pal specifically. 

Having said that, it doesn't mean you should let your horse stay in the stall the whole time. If anything, it could make matters worse. After a few days of stall rest, you should turn them out in the pasture and carefully exercise them. Go for a short, gentle hand-led walk on even terrain, and be sure to monitor their symptoms while doing so. If you spot any sudden resistance or signs of pain, it's time to return to rest. 

Will an Injured SI Joint in Horses Heal on Its Own?

In some mild cases, SI joint irritation may improve with rest alone, particularly if caught early and caused by temporary strain. However, most SI injuries involve ligament damage, inflammation, or degenerative change that does not fully resolve without intervention.

Without proper management, compensatory movement patterns often develop, placing additional stress on the SI joint and surrounding structures. Veterinary guidance, rehabilitation, and ongoing joint support are key to preventing recurrence and supporting long-term comfort and performance.

SI Joint in Horses FAQ

How Can I Tell the Difference Between Hock Pain and SI Joint Pain?

While both cause hind-end lameness, they often present with different flavours of movement:

• The "Feel" (Hock): Hock pain is usually rhythmical. You’ll notice a consistent "hitch" or a shortened stride in one leg. The horse may be stiff when they first comes out of the stall, but "warms out" of it.

• The "Feel" (SI Joint): SI pain is often asymmetrical and behavioural. Instead of a steady limp, the horse might feel "weak" behind, struggle to engage their core, or swap leads in the canter. They often don't "warm out" of it; in fact, they may get more frustrated as the workout continues.

• The "Toe Drag": Hock pain often leads to a worn-down toe on the shoe because the horse won't pick the foot up. SI pain often results in "plaiting" (walking on a tightrope where the hind feet land one in front of the other).

How Long Does It Take for a Horse to Recover From an SI Joint Injection?

Recovery is usually a "stair-step" process rather than an overnight fix:

• Days 1–3: Strict stall rest or small paddock turnout. This allows the anti-inflammatories (usually corticosteroids) to settle without the horse running it off.

• Days 4–7: Light hand walking or tack walking. You are looking for the "flare” period (a temporary increase in soreness) to subside.

• Weeks 2–4: This is the "Golden Window." As the inflammation drops, you must begin low-and-long work to build the topline.

• Full Work: Most riders see the peak benefit of the injection at the 3- to 4-week mark.

When Should I See an Equine Lameness Specialist for Back Pain?

General practitioners are great for routine care, but you should call a specialist (or a clinic with high-end imaging) if:

1. The "Cinchy" Horse: If your horse has suddenly started pinning ears, biting, or kicking out when the girth is tightened or when you mount.

2. Unexplained Canter Issues: If the horse refuses to pick up a specific lead, cross-canters constantly, or "bunny hops" with the hind legs at the gallop.

3. No Improvement with Rest: If you gave the horse two weeks off and the "cold back" or stiffness returned the moment you got back in the saddle.

4. Palpation Sensitivity: If the horse "drops" their back or cowers when you run your grooming brush or fingers over the croup/sacrum area. 

Proper nutrition and injury prevention, alongside a balanced training and conditioning plan, will help prevent SI joint pain in horses.

But the one thing that will help prevent and treat SI joint problems in horses is an equine joint supplement like Integricare's TRI-ACTA line of equine supplements. With high-quality, pharmaceutical-grade ingredients in an easy-to-serve therapeutic dose that contains glucosamine, chondroitin, and MSM, TRI-ACTAis the perfect preventative measure that will support your horse's SI joint from the inside. 

And if your horse is ageing, or already has an SI joint injury, you should consider feeding our TRI-ACTA H.A supplement. Offering the addition of hyaluronic acid, this formula helps keep your horse more mobile and improves the quality of its synovial fluid. 

Either way, you know there’s “neigh” better option than TRI-ACTA for preventing and treating SI pain in horses.

TRI-ACTA H.A. for Equine

Our maximum strength formula is perfect for horses that are ageing, experiencing arthritis and stiffness, are in training and competition, or under a heavy workload.

Learn More