Border Collie Collapse

Border Collie Collapse describes episodes in which a working Border Collie becomes suddenly unsteady, disoriented, or unable to continue during or shortly after intense exercise—typically herding, but sometimes ball chasing or agility. The dog may stagger, lie down abruptly, or appear dazed, yet often recovers within minutes to half an hour once activity stops. The pattern tends to emerge in warm weather and during sustained, high-arousal work, and it occurs almost exclusively in this breed. Owners often arrive at this page wondering whether what they witnessed was a seizure, heatstroke, or heart problem, particularly if it was the first time it happened. The dog may have seemed fine beforehand and returns to normal behaviour afterward, which can make the episode difficult to interpret. This page explores the signals that may point toward Border Collie Collapse, what is understood about the mechanism underneath, how the condition is investigated and distinguished from other causes of exercise-related collapse, and the approaches that exist for managing affected dogs.