What I have noticed is when leading the animal the exhibitor's hand will have the thumb pointed at the exhibitor, while setting up the animals the hand and thumb are in the other direction (They have also switched hands at this time). I think it is easier to get the animals head in the proper position with the thumb towards they animal, yet all you have to do to control they animal if it acts up is roll the wrist towards you moving the thumb towards you in that one motion.