Domino’s Pizza (DPZ) is pulling out all of the stops to significantly reverse a startling trend in its stores. Over the past year, the pizza chain has noticed a gradual weakening in sales at its U.S.

Domino's is a long-running pizza chain that has endured for years — even making it through an entire recipe overhaul in 2010 after continued complaints about the quality and taste of its pizza. In the ...