Laminitis (Founder)

Laminitis (commonly called “founder”) affects an estimated 7-14% of the world’s equine population. It’s the inflammation of the tiny, interwoven lamellae that attach a horse’s hoof to the underlying coffin bone (third phalanx, or P3) and support the horse’s entire body weight. Anything that impacts the integrity of the lamellae, such as inflammation, weakens their hold. This causes the coffin bone to displace within the hoof capsule and move toward the ground. The condition is very painful and is often life-threatening to horses.

Causes of Laminitis

The same disease has several different causes, which include:

  • Endocrine-associated laminitis, which is the most common cause, occurs in horses with insulin dysregulation, often due to equine metabolic syndrome (EMS) or pituitary pars intermedia dysfunction (PPID, or equine Cushing’s disease ), and exacerbated by ingestion of starch and sugars in feed or pasture (grass founder).
  • Sepsis-related laminitis is due to toxins in the bloodstream of sick horses (e.g., those with diarrhea, colic, retained placenta, or metritis—uterine infection);
  • Supporting-limb laminitis, which is caused by excessive weight bearing on a limb as a result of a painful injury in the opposite limb (e.g., fracture).

Clinical Signs (Symptoms) of Laminitis in Horses

  • Reluctance or inability to walk, or profound lameness;
  • Frequent weight shifting;
  • Abnormal stance and weight distribution to relieve pressure on the affected limb(s);
  • Increased heart and respiratory rate, and sweating;
  • Glazed, pained facial expression;
  • Bounding digital arterial pulses; and
  • Feet that are consistently warmer than usual to the touch.
Subcategories:
None

Saratoga County Euthanatized

Evelyn Pollard’s Saratoga County, winner of the Dubai Golden Shaheen (a Grade 1 race–G1) in the United Arab Emirates in late March, was euthanatized on July 29 after developing laminitis. The Thoroughbred was being treated for colitis

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Horse Owner Wins Laminitis Lawsuit

Jane McGarel-Groves was awarded 350,000 GBP (about $608,280 US) in damages after suing two veterinarians that treated her 14-year-old dressage horse Annastasia in 2001 with corticosteroid joint injections. The injections inadvertently caused

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Founder: Returning From the Brink

Founder. It’s one of those images that puts fear into our hearts. Donna’s initial onset occurred three years ago in December. Aaron Tangeman, DVM, examined her and took radiographs of both front feet.

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Feeding Horses With Laminitis

What do you feed a horse with laminitis? Nothing, plus a bit of hay is a common diet. Does it work? Yes, and no. Expert opinions and modern research are showing that, in some cases, nothing might be the wrong answer when it comes to feedstuffs,

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The Australian Take on Laminitis

The second most-common killer of our horses after colic is laminitis. The disease is a crisis, and it is often chronic and life-altering. It can be caused by illness unrelated to the foot, such as a retained placenta or grain overload. It can be

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Future Laminitis Research

A survey of American Association of Equine Practitioners (AAEP) members identified laminitis as the number one disease that requires research. Therefore, the Equine Laminitis Research Meeting and Panel will be held in

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Laminitis Claims Irish Sire In The Wings

Darley lost one of its flagship Irish stallions Saturday with the death of In The Wings, winner of the 1990 Breeders’ Cup Turf (gr. IT) and a proven European classic sire.

The 18 year-old son of Sadler’s Wells–High Hawk (by Shirley

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Cushing’s Disease and Laminitis–Not Just Old Horses

Researchers recently revealed that Cushing’s disease is a major contributing factor to laminitis among horses in a primary care veterinary practice, and that the median age of laminitic Cushing’s horses was 15 1/2 years–disproving tha

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Understanding the Venogram

The venogram, a procedure for visualizing blood flow within the foot, has been acclaimed by many as an essential tool for treating lame horses, especially laminitic ones.

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Foot Problems: One Step at a Time

We all should be aware of our level of competence with foot problems–horse owners, veterinarians, and farriers. Since there is no formal education in the field of podiatry, training must be sought on an individual basis.

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AAEP 2002 Laminitis Sunrise Session

?Never use only clinical assessment to estimate the progress of a laminitic horse,? began Ric Redden, DVM, moderator of the laminitis Sunrise Session on Dec. 7 and founder of the International Equine Podiatry Center in Versailles, Ky. ?X rays an

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Australian Unit Receives Grant for Laminitis Studies

The Animal Health Foundation recently announced that it has made a $50,000 research grant to Christopher C. Pollitt, BVSc, PhD, associate professor in equine medicine and director of The Australian Equine Laminitis Research Unit at the School of

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The Piedra Foundation Announces Grants, Seminars, Events

2000 TPF Applied Equine Medical Research Grants

The Board of Directors of the Oak Tree Racing Association recently announced that they will renew funding for The Piedra Foundation’s Applied Equine Medical Research Grants which began i

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Derby Winner, Top Japanese Sire Sunday Silence Dies

The long vigil is over. After 14 weeks of battle, Sunday Silence died of heart failure Sunday, Aug. 19, brought on by infection in his leg and the debilitating effects of laminitis.


At Shadai Stallion Station in Japan’s Hokkaido, where

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