The Canny Collar is a revolutionary dog training collar proven to stop pulling on the lead and help with dog walking in a kind, safe and effective way. It is a simple piece of dog training equipment made up of a conventional flat collar with a traditional buckle fastening for security. The Canny Collar works by a simple pressure and release system. The lead attaches to a thinner slip line, made from soft yet strong material, which then fits over the nose of your dog. Unlike other dog walking devices which fasten under the chin, the lead fastens behind your dogs head on the Canny Collar. This represents an innovative and unique design in dog behaviour training on lead. When your dog is pulling on the lead, gentle pressure is applied to the bridge of his nose. As soon as he learns to stop pulling, the pressure is released. This effortless dog training method simply harnesses what most owners do naturally when their dog pulls - they pull back! When the pressure releases, your dog quickly realises that by not pulling on the lead and walking at your side is the most comfortable way to walk, making the experience more pleasurable for you and your dog! To get the correct measurement, measure at the top of the neck just behind the ears. Fasten around your dogs neck, with the buckle just behind his ears. Pull each end of the thin slip line behind your dogs head and attach your leash to both D rings. Pull the slip line through the yellow plastic guider at the front and place over your dogs snout, leaving the plastic guider under your dogs chin. When your dog pulls on the leash, apply gentle backward pressure. Instant release of the pressure occurs when he stops pulling. Your dog trains himself to stop pulling.