LAS VEGAS (January 14, 2016) – (NYSE: SHAK) Bird’s the word. The Chick’n ShackTM ($6.29), Shake Shack’s debut chicken sandwich, lands on all U.S. Shake Shack® menus on Thursday, January 14th (‘cept for NYC's Theater District Shack, JFK Airport Shacks and stadium Shacks. The Theater District Shack will start serving up the Chick’n Shack shortly thereafter). The Chick’n Shack is a crispy 100% all-natural and antibiotic-free chicken breast with lettuce, pickles and buttermilk herb mayo. This new menu item made its first appearance at the Brooklyn Shacks last summer.