Companion Animals

Horse Equine Metabolic Syndrome and Welfare

Equine metabolic syndrome causes laminitis risk and obesity-related welfare problems in ponies and horses with insulin dysregulation, requiring lifelong dietary management.

Key Facts

EMS is characterized by regional adiposity, insulin dysregulation, and predisposition to laminitis
Native breed ponies including Welsh, Dartmoor, and New Forest are disproportionately affected
Laminitis triggered by EMS is the leading cause of euthanasia in UK native ponies
Restricted grazing using grazing muzzles or drylot management is central to management
Exercise improves insulin sensitivity but must be avoided during active laminitis episodes

Welfare Considerations

EMS management presents a welfare paradox - restricting grazing in animals with strong motivation to eat grass causes frustration and behavioral signs of distress, but failing to restrict grazing risks severe, painful laminitis. Balancing these competing welfare concerns requires a management strategy that minimizes dietary frustration while preventing the far more serious welfare harm of laminitis.

What You Can Do

Use a properly fitted grazing muzzle to allow safe pasture access for EMS-affected ponies
Work with your vet and nutritionist to formulate a calorie-controlled diet with adequate forage
Monitor body condition score monthly and track digital pulses as an early laminitis warning
Use track systems or sparse pasture to allow movement while limiting calorie intake