Some yodels contained more of the Alpine type of yodel as well. Rowan plays guitar and mandolin, yodels and sings. Zehnder sings normally, sings overtone, and yodels. Prevalent on these early recordings are her characteristic whoops, yips, and yodels. Briggs sings traditional and contemporary folk songs, specializing in mountain yodels. His vocals included bird calls, train whistles and yodels. The title is punctuated by the hound dog yodels of fiddler Jerry Rivers. Ilinca yodels prominently during the chorus, while Florea provides rap vocals. Mary Schneider is an Australian singer and performer who yodels the works of classic composers. Jerry starts to eat the Emmentaler and "yodels". But their words were lost among the enthusiastic yodels of their comrades. Yodels are distributed on the East Coast of the United States. Formerly Yodels used a different formula, with thicker, denser cake and came packaged in foil. Before departing, Roberts taught Haley some of his yodels.