The farmer Johannes owns a dairy herd. Twenty cows, each cow has a bell with a different acoustic. Listening out for the bells tell him where each of them are. Johannes says his biggest problem is tourists nicking the bells. Three went last week.

Protein plus

A bit mindblowing is the thought that the cow bells have been ringing constantly since the first time I came here forty years ago. So many cows, so much grass, cud, milk, cheese, cheese products.

All that time, all that goodness, and they haven't been able to come up with one decent tune. 

Horses have bells too.