Stringhalt is a neurological condition causing involuntary hindlimb hyperflexion in horses that varies from mild to severely debilitating and welfare-compromising.
Stringhalt welfare impact depends entirely on severity. Mild unilateral cases in otherwise healthy horses may cause minimal welfare compromise. Severe bilateral cases cause extreme movement difficulty, falls, muscle wasting and significant distress. Australian stringhalt from toxin ingestion can progress rapidly to complete inability to walk. Horses with severe stringhalt require urgent assessment and, if affected by plant toxin, removal from pasture immediately. The decision to continue treating versus pursuing euthanasia in severe cases requires honest welfare assessment — horses unable to lie down, rise or move comfortably are suffering significantly.