Treatment....

Most cases of stringhalt are associated with nerve degeneration. The specific cause this degeneration is unclear, but it might be caused by ingestion of certain plants such as vetch and sweet peas, which contain compounds that damage peripheral nerves. Australian stringhalt commonly involves groups of horses and is thought to be caused by ingestion of flatweed (Hypochoeris radica). Trauma to the dorsal hock or dorsal metatarsal regions can also cause the abnormality by damaging nerves or causing adhesions to tendons.
Some cases of stringhalt may resolve without treatment, often requiring months. Affected horses should be removed from pasture and the pasture should be inspected for toxic plants known to cause stringhalt. Sedative medications may reduce anxiety and improve the condition. A surgical procedure, which involves removing a section of one of the tendons crossing the outer portion of the hock, will bring about improvement in some cases. The prognosis for recovery from stringhalt is guarded to fair; some horses never recover from the condition regardless of treatment.