The most ideal way to train your dog to walk is by your side, as it ensures all walks are safe and enjoyable for both of you. The key to successful lead training is to use a 3-4 ft training lead and not a retractable or slip lead, as your aim is to encourage your dog to walk as close by your side as possible.
To properly train your dog on a leash you must first get them to stand on the opposite side of the side you’re holding the leash on. To do this easily, hold the lead in one hand and a treat in the opposite hand, this allows for the leash to cross-over your body when they come to get the treat, this is the position they should stay on.
From this position it is all about trial and error of commands and walking. Let your dog sniff the treats in your hand, raise your hand to your shoulder and give the command to walk, as they take one step forward with you, stop and give them a treat. This positive reinforcement and treat association will help to encourage the correct walking behaviour.