Cat is about the horse having control over the proximity of interaction. On a relaxed signal Lynn would step back, giving Sakima control. This continued for many weeks as Sakima was a highly sensitive wild caught brumby, with a total fear of humans where he tolerated no human touch. With the realisation that Sakima could control the scary thing, in this case Lynn and make her go away, there is chemical change with the fear pathway in the brain. Suddenly the horse seeks the thing it feared and here we see Sakima stepping forward to Lynn, where in the past he would have stayed away. The is the behaviour of the horse called switch over, referring to when the brain switches from a fear emotion to a seeking emotion.