Mud fever is widespread in UK horses during winter. Prevention through pasture management and leg care protects welfare better than treatment after infection develops.
Mud fever prevention requires proactive management during the high-risk winter period rather than reactive treatment after infection develops. The chronic pain of severe mud fever - swelling, scabbing, and lameness - is substantially more welfare-compromising than the management required to prevent it. Anticipating mud fever risk and acting preventively is the most welfare-positive approach.