Tick paralysis is a neurological emergency caused by neurotoxins in tick saliva, causing ascending paralysis that can be rapidly fatal if the tick is not found and removed.
Tick paralysis causes progressive loss of function that is deeply distressing to affected dogs. The ascending paralysis — beginning in the hindlimbs and spreading forward — means dogs become increasingly unable to move while remaining conscious; the experience of progressive helplessness in an alert animal is a significant welfare concern. Respiratory involvement creates genuine breathing difficulty that worsens as paralysis reaches the intercostal and diaphragm muscles. Without treatment, death from respiratory failure is distressing and prolonged. The welfare impact is compounded by the speed of progression — an apparently healthy dog can deteriorate from mild weakness to respiratory crisis within 24 hours, creating both welfare urgency and owner distress. The complete preventability of tick paralysis through appropriate tick control makes this condition one of the most welfare-significant entirely avoidable companion animal emergencies.