A slip lead can be a very useful and quick solution if you are simply moving your dog  from one place to the other, for example from the car to the park for a run off lead. A slip lead can also be useful for training as you have more control over your dog. However, please use a slip lead correctly, it should not be worn around the dog’s throat, which would be very uncomfortable for the dog (as with anything around his throat) if the dog pulls, it should be worn high on the neck, if the dog pulls (pulling the lead down to his throat, stop walking, move the slip lead back up just behind the ears and start walking again.

A useful way to train your dog to walk to heal.
For tips, see some example videos.