The HALTI Headcollar stops dogs from pulling. The HALTI works by steering the head so the body has to follow, making training and behaviour modification of dogs practical and safe. It was the first ever dog headcollar and was Invented in 1979 by Dr Roger Mugford. Product Information Additional neoprene padding on the nose helps ensure a comfortable fit and for extra control, it also features an on/off muzzling action to close the dog's jaws. The HALTI is approved by vets and canine experts worldwide and millions have been sold to grateful owners of pulling dogs.