Equine Metabolic Syndrome causes significant welfare harm through laminitis risk and associated management burdens. Prevention through diet and exercise is highly effective.
Equine Metabolic Syndrome welfare impacts operate primarily through the laminitis pathway — one of the most painful and potentially permanently disabling conditions in horses. EMS horses that experience repeated laminitis episodes accumulate irreversible lamellar damage, potentially leading to rotation or sinking of the pedal bone within the hoof that requires euthanasia. Prevention is dramatically more effective than managing established severe laminitis: maintaining appropriate body condition, restricting pasture access during high-sugar periods, and providing tested low-sugar hay eliminates most laminitis episodes in managed EMS horses. The welfare motivation for rigorous EMS management is the avoidance of extreme, prolonged pain from laminitis — arguably one of the strongest welfare arguments in equine medicine.