A dog-training method includes a device having a left connector, a right connector, a back strap, a girth strap, and a chest strap. The chest strap at a first end couples to the right connector and a left second end passes through a center portion of the left connector and ends in a left-leash coupler which is larger than the center portion of the left connector so that the left-leash coupler cannot pass through the center portion of the left connector. The chest strap further includes a right free-moving strap coupled to the left connector with a right second end passing through a center portion of the right connector and terminating in a right-leash coupler that is configured larger than the center portion of the right connector so that the right-leash coupler cannot pass through the center portion of the right connector.
