Maybe people in the Uk should try cow bells too..

As normal catbells do not stop cats hunting.

Placing three bells on a cats collar (One under chin,one on each side) works better at scaring prey but they will still catch some.

The best thing a normal catbell does, is tell other cats where your cat is. (i.e. Your cat is more likely to get into fights.)

But I don't know anything about cowbells...