Thrush is a degenerative bacterial condition of the equine frog and sulci that causes pain, lameness, and structural damage when poorly managed.
Thrush causes a spectrum of welfare impacts from mild discomfort to significant lameness when neglected. Many horses tolerate early thrush stoically, masking pain until tissue damage is severe. Daily hoof picking is a fundamental welfare requirement for horses in managed environments — failure to provide this basic care constitutes negligence that allows preventable suffering. Horses confined in inadequate stabling with insufficient mucking out are at highest risk. The condition is entirely preventable with appropriate management but requires consistent effort from caretakers. Treatment is straightforward — debridement, drying, and topical antimicrobials — but requires veterinary or experienced farrier involvement when deep penetration has occurred. Early detection through daily handling and routine farrier visits prevents the welfare suffering associated with advanced cases.