Fox hunting jumping. Forces opponents side to face you. Forces opponents back to face you. Originally created as smaller versions of their larger smooth fox terrier dog breed ancestors toy fox terriers have been used for a variety of tasks serving as ratters on farms and as hunters of. Jumping plays a major role in many equestrian sports such as show jumping fox hunting steeplechasing and eventingthe biomechanics of jumping the influence of the rider and the heritability of jumping prowess have all been the focus of research.