Equine Metabolic Syndrome: Horse Welfare

Equine Metabolic Syndrome (EMS) is a hormonal disorder that predisposes horses and ponies to painful laminitis. Management focuses on diet, exercise, and monitoring.

Key Facts

EMS is characterized by insulin dysregulation, obesity, and abnormal fat deposits (cresty neck)
Affected horses have exaggerated insulin responses to dietary sugars and starches
High insulin levels trigger laminitis — painful inflammation and rotation of pedal bones
Native pony breeds (Welsh, Shetland, Dartmoor) have the highest genetic predisposition
Pasture grass in spring and autumn can trigger acute laminitis in susceptible animals
Diagnosis involves blood insulin testing, ideally under dynamic (feeding) conditions

Welfare Considerations

EMS-related laminitis causes intense, chronic pain and is a leading reason for euthanasia in horses and ponies. The condition is largely preventable through strict dietary management — low-sugar hay, restricted or no pasture access during high-risk periods, and regular exercise for appropriate cases. Many owners fail to recognize early warning signs (mild footiness, reluctance to move) until severe rotation has occurred. Early intervention significantly improves welfare outcomes.

What You Can Do

Monitor body condition score and cresty neck score regularly in at-risk breeds
Use grazing muzzles and restrict pasture access in spring and autumn for EMS-prone horses
Have horses with recurring laminitis tested for underlying insulin dysregulation
Work with an equine nutritionist to formulate a low-sugar, appropriate-calorie diet