I'm far from being an expert, but will share my experience. My girl gets super excited when I run w/ her. Walking= fine, but as soon as I pick up a pace and skip, frolic, run, whatever= she gets excited and bites her leash, tugs, jumps,nips, barks, etc... I have worked on this simply by giving her prong collar a quick jerk and saying NO!. Thats it. No more of that monkey business. good luck.