Some dairy farmers have long suspected that playing a bit of mood music can boost milk production in dairy cows. It's not unheard of for farmers to play relaxing jams for their herds, and the picture above shows a vaudeville act serenading the cows in the University of Wisconsin, Madison's dairy barn in 1930. The show was apparently part of an experiment to see whether the soothing strains of music boosted the cows' milk production.
Read more at:http://www.npr.org/blogs/thesalt/2014/03/06/285314648/secret-life-of-cows-part-deux-milking-mood-music
