According to science, cows enjoy listening to music under 100 bpm (groundbreaking research if you ask me), and milk production even goes up when listening to it; in fact, it went up by as much as 3% when cows listened to R.E.M.'s 'Everybody Hurts'. 

 

And when cows are made happy, stress hormones aren't released into the milk. I think we should be keeping cows happy no matter what, but there's also a business case for doing so. As stress hormones can affect the taste and nutrients of milk, I propose that Country Life play music on their dairy farms to improve the taste of their butter and increase milk production.