http://www.le.ac.uk/press/press/moosicstudy.html
and
http://www.organicconsumers.org/rbgh/classical_music_milk_production.cfm
[i]"Moo" over Limp Bizkit? Researchers at Great Britain's University of Leicester found that 1,000 Holstein cattle exposed to slow music (less than 100 beats per minute), such as Beethoven's Pastoral Symphony, gave 3 percent more milk than those not exposed to music at all. Fast, screechy music (more than 120 beats per minute) actually caused a decrease in milk production."[/i]
Wonderstuff's 'Size of a cow' didn't feature well apparently!