I wish Louie would let us sing. My husband and I both work in music related industry and Louie can't stand music of any kind!!! He barks even louder if we sing to him or play any instrument...Thank Goodness the Kitties are "Rocker Kitties"!...Maybe Louie is just trying to join in?..... We sing to Louie anyway... Usually "Louie the Dog" sung to the tune of Winnie-the-Pooh.