Totally agree all the strength of a dog pulling is created through the shoulders and top half of a dog were a harness is put the lead just behind its skull at the top of its neck you can control them with one finger and extendable leads if you can't let a dog run free get a cat it breaks me when I see spaniels or a runner on them things because the owner doesn't have the confidence or know how that they will return which if they would if they could have a run