A martingale dog collar is one of the best no pull dog collars, but it isn't the right choice for every breed of pooch. Before committing to a collar, do a little research to find out what kind of collar is beneficial to your pup. Martingale collars apply pressure thanks to an extra loop of chain or material that tightens just a bit with the tug of the leash. It's gentler than a choke collar or pr…
