Kelly is a big puller, so before our training began we outfitted her with a front-clip harness, which helped a lot. What also helped was consistently changing directions when she did pull, and clicking/treating when she was walking with us. Within 15 minutes she was walking considerably better, with much less pulling and even offering her attention. With practice she will only get better.
Jeff Dentler, CPDT-KA, FFCP, CTDI