How to deal with a collapsed horse [H&H VIP]

Why might a horse fall to the floor without warning? Keith Chandler MRCVS discusses the difficulty in diagnosing the cause of faints, fits and seizures

One of the most frightening things that can happen to a rider is when a horse collapses. It doesn’t happen very often, fortunately. But when it does it can be dangerous for everyone around — as well as potentially fatal for the horse.