A leash having a warning device that produces an arc sound and/or vibration generated by an electrical arc between electrodes in a manner such that no electricity can be imparted into a human or animal, and a method of using the leash. Also provided is an animal training device that mounts on a collar or harness worn by the animal, which produces an arc sound and/or vibration generated by an electrical arc between electrodes in a manner such that no electricity can be imparted into a human or animal, and a method of a using the animal training device.
