
In the showring you have to have the dog between you and the judge, whichever side the judge might be on, so you need to train the dog to go equally well on either side.
Some judges occasionally ask for two circuits of the ring clockwise, followed by two circuits anti-clockwise; for the clockwise circuits the dog would be on your right, and for the anti-clockwise circuits the dog would be on your left, because the judge is in the centre of the ring.