Halti Size 5 Black Dog Training HeadcollarIt is easy to see why Halti is the best selling headcollar around the globe! If you have a large powerful dog or one that pulls on the lead, you will know how difficult dog walks can be. Dogs of all sizes can pull on the lead which can be dangerous to them and their owners. The Halti Headcollar was designed by Dr Roger Mugford to solve this problem. Its revolutionary design is based on the same principle as a horse's headcollar, if you guide the head