Some music made for pets claims to actually have healing and stress-relieving powers. The company Healing Touch for Animals produces and sells a music CD, "Healing Music for Animals & Their People" According to the company. "The sound travels through the body promoting a movement of expansion and contraction that helps release blockages held within the body." They feel that this music is a tool that can be used to assist both animals and people with relaxation techniques. In this way, the body is better able to relax and regulate the immune system, which can encourage self-healing.
For more information go to Music Soothes the Savage Beast: Music for Dogs and Cats.