If your dog pulls on the lead walking can be a pain instead of a pleasure the gencon all in one is recommended by several dog trainers as the most effective tool to use to stop your dog from pulling on the lead the standard gencons are made to walk the dog on your left hand side special right hand gencons are also available gencons consist of two loops one goes over the nose the other round the neck when the dog pulls both loops tighten restricting the whole head the dog backs off fr