Several centuries ago, the mice called a meeting to consider their sad situation.

All the speakers agreed on the fact that it was the fault of the cats and they debated on the ways in which they could avoid being hunted by them.

Finally, a solution was proposed and everyone approved. It was decided to attach a bell to every cat so that the mice would hear them coming.

This law is still in force. But unfortunately no mice have come forward to volunteer to put the bells on the cats.