Relaxing piano music for cat and kittens with cat purring sound, birds chirping & meow, Cat sleep music.br relaxing and calming deep sleep music for cat and kittens with cat purring sound birds chirping meow.br Soothing and Calming Cat music recommended by "Journal of the American Holistic Veterinary Medical Association"(JAHVMA) Dr. Susan Wagner.br As The "New York Times" reports, the chirping, purring and sucking sounds of birds comfort cats. Cats are able to hear frequencies up to 64,000 hertz.br "Dr. Susan Wagner" says that cats of all ages prefer calming and soothing sounds, such as classical music, pop music, nature sounds or music made especially for them.br In one experiment, cats responded most positively to classical music and to pop music in another.