Martingale Style Collars and Leashes Martingales are for dogs, and their owners, that prefer a gentle, non-pulling collar when they walk on a leash. This style is especially useful with dogs that have larger necks and smaller head (e.g. pugs). Martingale collars do not come with a side-release buckle, they slide over your dogs head; therefore, the collar must be large enough at its maximum adjustable size to slide over the widest part of your dog’s head.
