the Chicks’ camp, and that’s not just whistling the absence of “Dixie.” On top of a name switch, the superstar country-pop trio formerly known as the Dixie Chicks has also made a management change, Variety has learned. The group is now being represented by John Silva’s Silva Artist Management.There, the Chicks join a stable that includes Foo Fighters, Beck, Nine Inch Nails, St.