Listen to Sleep Song online. Sleep Song is an Unknown language song and is sung by Pet Music Academy / Pet Care Club. Sleep Song, from the album Best Soothing Songs for Dogs & Cats (30 Sleepy Sounds to Relax & Calm Down Your Animals, Wellness for Pets, Good Behaviour, Gentle Piano for Relieve Animals Anxiety), was released in the year 2017. The duration of the song is 3:27. Download Unknown songs online from JioSaavn.