NORWICH, N.Y. — Since word of mouth was the driving force behind the success of Chobani, it was a natural fit to feature actual users in its first major ad campaign this spring. The company also recently launched Chobani Champions, the first-ever Greek yogurt for kids. The smaller-portion, 3.5-oz. cup (100 calories) is available in two flavors: Honey-Nana and VeryBerry. Also new in the company’s core Chobani Greek yogurt line are lemon, mango and black cherry flavors.