Horse Metabolic Syndrome: Welfare and Management

Equine Metabolic Syndrome (EMS) and Pituitary Pars Intermedia Dysfunction (PPID) are common hormonal disorders in horses with significant welfare implications including painful laminitis.

Key Facts

EMS affects an estimated 20-30% of the domesticated horse population
Laminitis (painful inflammation of the foot) is the most serious complication of EMS
Native pony breeds (Welsh, Shetland, Dartmoor) are genetically predisposed to EMS
Dietary management — restricting non-structural carbohydrates — is the primary treatment
PPID (formerly called Cushing's disease) affects over 21% of horses over 15 years old

Welfare Considerations

Metabolic disorders in horses are deeply intertwined with welfare because the primary complication — laminitis — is one of the most painful conditions a horse can experience. Horses with laminitis suffer intense, chronic foot pain that severely limits movement and quality of life. Prevention through appropriate diet, body weight management, and early diagnosis is far more effective than treating established laminitis. Recognizing the early signs of EMS and PPID and seeking veterinary guidance is essential for horse welfare.

What You Can Do

Have horses over 15 regularly screened for PPID with an ACTH blood test
Monitor body condition score monthly and maintain horses at a healthy weight
Restrict access to lush spring and fall pasture for horses with EMS or weight issues
Learn to recognize early signs of laminitis: heat in hooves, shifting weight, reluctance to move
Work with a vet and equine nutritionist to create appropriate feeding plans for at-risk horses