Idiopathic vestibular disease (old dog vestibular syndrome) causes sudden, severe disorientation in older dogs that is frightening but typically resolves within weeks with supportive care.
Vestibular disease causes acute welfare distress in affected dogs — sudden inability to stand normally, rolling, disorientation, and vomiting are profoundly frightening experiences. Owners who witness the acute onset often believe their dog is dying. The welfare burden for the dog includes the acute disorientation and nausea of the episode itself, plus the secondary distress from their evident disability. Most dogs improve substantially within days, and welfare management during this period focuses on preventing injury from falls, managing nausea, providing excellent nursing care, and reassuring both dog and owner that recovery is expected. Persistent nystagmus or failure to improve warrants veterinary reassessment.