The martingale design is the top choice for training a dog to stop pulling. These collars tighten as your dog pulls but they do so safely, without choking your dog. If your dog’s head is smaller than his neck, this design is ideal. Instead of letting your pup master his escape tricks, these collars are designed to keep a secure fit (even on pups that have mastered the art of backing up and wiggling out of their collars). Although there are collar options that have spikes on them, we don’t recommend these. These can severely injure your dog and do not set the appropriate tone for training. If you’re still training your dog not to pull, it’s best to engage in training with a different type of collar. Once your pup is used to not pulling, you can reward him with a stylish Cuban link dog collar he’ll love!