Shivers is a chronic, progressive neuromuscular condition in horses causing characteristic hindlimb trembling, and its welfare impact and management require specific understanding distinct from other equine lameness.
Shivers welfare is complicated by the unpredictable nature of the condition and the practical management challenges it creates. The characteristic inability to hold the hindleg still for farriery creates a welfare problem for both horse and farrier: routine hoof care becomes a stressful ordeal when the leg trembles and flexes involuntarily. Horses that deteriorate to the point where they cannot be safely shod face progressive hoof care neglect as a secondary welfare consequence. The progressive nature means welfare planning must anticipate decline rather than assuming stability. Dietary management may offer some slowing of progression, but does not reverse existing neurological damage. The lack of clear pathological understanding means horses with Shivers are sometimes subjected to multiple diagnostic interventions or ineffective treatments. Humane management focuses on adapting routine care to the horse's capabilities, working with patient farriers familiar with the condition, and maintaining quality of life as long as the horse is comfortable.