Laminitis in Horses: Emergency Response and Long-Term Management

What Laminitis Actually Is — and Why It Is Always Urgent

Laminitis is inflammation of the sensitive laminae — the interlocking tissue layers that suspend the coffin bone (distal phalanx, or P3) within the hoof capsule. Think of the laminae as Velcro: thousands of interlocking leaves of tissue that hold the bone in place against the inner hoof wall. When inflammation disrupts blood flow to these tissues, the laminae begin to fail. Without their support, the mechanical forces of the horse's weight begin to pull the coffin bone downward and rotate it away from the hoof wall. In severe cases, the tip of the coffin bone can penetrate the sole of the hoof.

This is not a condition you manage from a distance. Every hour matters in an acute case. I have seen horses go from mild discomfort to rotation requiring euthanasia within 48 hours because the owners waited to see if it would resolve on its own. It will not resolve on its own. If you suspect laminitis, call your veterinarian immediately.

Recognizing the Triggers

Laminitis does not come from nowhere. Identifying the trigger is essential for treatment and prevention of recurrence.

Pasture-Associated Laminitis

This is the most common cause in my practice, particularly in the spring. Horses with equine metabolic syndrome (EMS) or those simply unaccustomed to lush pasture are at extreme risk when nonstructural carbohydrates — sugars and fructans — spike in rapidly growing grass. Overcast mornings followed by sunny afternoons, early spring growth, and stressed or frosted grass are especially dangerous. The pony that has been on a bare lot all winter and gets one week on spring pasture is a classic presentation.

Grain Overload

A horse that breaks into the feed room and consumes a large quantity of grain is a laminitis emergency before the first sign of foot pain appears. The carbohydrate overload disrupts the hindgut microbiome, releases endotoxins, and triggers a cascade that damages the digital vasculature. If you know your horse has consumed excess grain, call your veterinarian before signs appear — there is a treatment window for prevention.

Endocrine Disease: EMS and PPID

Equine metabolic syndrome involves insulin dysregulation, and horses with EMS are chronically susceptible to laminitis from even modest carbohydrate intake. Pituitary pars intermedia dysfunction (PPID, or Cushing's disease) causes abnormal cortisol-like hormone levels and is the leading cause of laminitis in horses over 15 years old. Both conditions require medical management alongside hoof care.

Systemic Disease and NSAID Overuse

Retained placenta, severe colitis, pleuropneumonia, and other systemic inflammatory conditions can trigger laminitis through endotoxemia. Overuse of NSAIDs, particularly phenylbutazone at high doses over extended periods, can cause a right dorsal colitis that triggers a similar cascade. Horses on long-term bute need monitoring.

The First 24 Hours: Emergency Response

When a horse presents with the classic signs — a rocking-back stance shifting weight off the front feet, heat in the hooves, strong digital pulses felt at the fetlock, and reluctance to move — your response in the first 24 hours sets the trajectory for everything that follows.

Step one: remove the trigger. Get the horse off pasture immediately. If grain overload is suspected, your vet may recommend oral activated charcoal or a laxative to limit further absorption. Do not wait to see clinical signs before acting on a known exposure.

Step two: restrict movement. Do not walk a laminitic horse to “get the blood moving.” Movement on inflamed, failing laminae causes mechanical damage. Confine the horse to a deeply bedded stall — 6 to 8 inches of sand or shavings — which provides conforming support to the sole.

Step three: support the frog. Deep bedding or frog support pads (Styrofoam pads taped to the feet or purpose-made laminitis support boots) take mechanical load off the toe and transfer it to the frog and digital cushion. This reduces the rotational force on the coffin bone.

Step four: call your veterinarian. Do not administer bute or Banamine before your vet has assessed the horse if it can be avoided — these medications can reduce the apparent severity of pain and delay appropriate intervention. Your vet will administer pain management, begin anti-inflammatory treatment, and advise on radiographs.

Obel Grading and Radiographic Assessment

Your veterinarian will assign an Obel grade to assess severity. Grade 1: the horse shifts weight but moves reasonably well. Grade 2: the horse moves with a characteristic shortened, pottery gait, and reluctantly picks up a foot. Grade 3: the horse resists moving and is very reluctant to pick up feet. Grade 4: the horse will not move without force.

Radiographs of the front feet are essential to assess whether rotation or sinking has occurred and to what degree. Lateral views allow measurement of the angle between the dorsal hoof wall and the dorsal face of the coffin bone (rotation), and the distance the coronary band has dropped relative to landmarks (sinking). These measurements guide farrier care and inform prognosis. A horse with 10 to 12 degrees of rotation and good sole depth has a very different outlook than one with 20 degrees of rotation and a sole depth of 5 mm with the tip of P3 near the sole surface.

Long-Term Management: The Farrier Is Your Partner

Once the acute phase is controlled, long-term soundness depends on close collaboration between your veterinarian and your farrier. The goal is to restore correct coffin bone alignment within the hoof capsule, support the frog, and minimize breakover forces at the toe.

Common approaches include deep-seated shoeing with wide-web aluminum shoes and frog support, heart-bar shoes, wooden shoes, or specialized glue-on systems. The specific prescription must be based on radiographic measurements — shoeing by eye alone is not sufficient for a rotation case. Radiographs every 4 to 8 weeks allow the team to track whether the coffin bone is stabilizing and whether the hoof capsule is growing out correctly. Corrective farriery combined with appropriate medical management can achieve remarkable rehabilitation even in horses with significant initial rotation.

Ongoing Medical and Nutritional Management

For horses with EMS, dietary management is non-negotiable. Pasture access is often permanently restricted or eliminated. Hay should be tested and ideally soaked for 30 to 60 minutes to reduce nonstructural carbohydrate content. Grazing muzzles reduce intake but are not appropriate for horses in active laminitic episodes. For horses with PPID, pergolide (Prascend) is the standard treatment and often dramatically reduces laminitis recurrence when managed correctly. Regular ACTH testing guides dose adjustments, particularly in the autumn when ACTH levels are seasonally elevated in all horses.

Laminitis is one of the most complex conditions in equine medicine, and no two cases are identical. What I can tell you from experience is this: horses that receive immediate, aggressive intervention in the first 24 to 48 hours — combined with committed long-term management — have the best outcomes. The horses that do poorly are the ones whose owners waited, or who treated the pain without addressing the cause. Be the owner who acts fast, builds a good team, and stays the course.