Do horses have souls or a ‘spirit’? When form expert Marten Julian was looking to buy a horse, he asked Declan Murphy to assess it. The former jockey watched it walk then studied its face closely before giving the thumbs-down. ‘That horse,’ he said, ‘has had its spirit broken.’ Murphy’s response led Marten to roam the world of those who work with horses to ask how they try to assess a horse’s individual personality and seek to maximise its potential.