Check out "Through A Dog's Ear": A collection of Cd's found to be soothing to dogs. From Lisa Spector, "Through a Dog's Ear" research team member: "In 2002 Deborah Wells conducted research in shelters - playing different types of sound (classical, heavy metal, pop, no music, and human conversation). Through her study, we came to understand that classical music had a marked soothing effect on dogs in animal shelters when compared to the other types of auditory stimulation. Our research team (Sound Researcher, Joshua Leeds and Veterinary Neurologist, Susan Wagner) wanted to take that research further to see if psychoacoustic arrangements of classical music that was being used in classrooms, clinics, and neurodevelopmental centers for humans would help relieve anxiety issues in dogs. The results of that research can be found here:"