I recommend that you begin teaching your dog how to sit and stay prior to beginning any leash training! Having a reliable sit and stay will enable you to ask for this command if your pup starts pulling on the leash. This will help you refocus his attention and help him get back to your side! It is also safer to have a dog that has a reliable sit and stay, so that you are not pulled out into traffic while walking together! Leash training, like all dog training, requires immense amounts of patience on both your parts! But, the payoff will be a well-trained dog that all of your friends envy, and builds a relationship of love and trust! So, grab your clicker and a pocket full of treats and get out there! Have some fun together while learning valuable skills! When your dog has mastered leash walking check out loose leash training!
Dog leashes are used to walk the dog in public places. Having the dog wear a leash is a way of protecting the dog and other persons (e.g., if the dog runs away and bites someone). Also, the length is one of the important aspects of the leash. The length of the leash must be chosen according to the size of the dog and it is important because it allows a good control. Leashes should not be either too long or too short. Too long leashes do not provide good control of the pet which can result in unpleasant accidents with more aggressive dogs whereas too short leashes are uncomfortable for both the dog and the owner. The perfect leash can restrain the dog but at the same time is not viewed as a punishment for the pet.[9]
Consider why puppies pull when they are walking; there are many things that tempt your dog when you’re out for a walk, like children playing in the yard across the street, you neighbor grilling some hot dogs and that squirrel in the tree at the park. Your pup will try to get where he wants to go, even if that means pulling you along with him! If he pulls on the leash and you allow him to, you’ve reinforced that pulling gets him what he wants. Once you’ve allowed him to do this, he’ll do it again and again:

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