We have a basically well trained Keplie x BC, looks like all Kelpie. Trains very well, does tricks, starting agility..fine most of the time...however, has an obsessive behavior of when exiting the farm vehicle, runs at high speed up the track. Does it also in the house, he is either very relaxed or wanting to dive out the back dog door at high speed, partly run back inside, wanting for the other dog to run with him..he is not allowed. When he is those 'moods' he hears nothing, food rewards don't work, won't look at them, is fixated on running. Even when he first runs off in the paddocks, will come 3/4 way back and crouch, all revved for the next run back. Has a very good 2 min stay etc, BUT when in the zone, hears nothing. Any ideas?