A harness for your dog will take the pressure off of the dog's sensitive neck area while you are teaching your dog to walk in a loose leash. We high recommend a harness and in particular the Ruffwear or Balance Harness. These are light weight, have a front and top connection for use with a double ended leash and are designed so that the dog's shoulder area is not restricted.
One of our favourite leashes is the Halti Training Leash. This is a double ended leash, useful for front and rear connection on a harness which makes makes walking your dog easy and enjoyable. The Mycicy Long line is a wonderful tool as it will allow you to practice recall and distance cues with your dog while keeping them safe on a leash.