New ask Hacker News story: How to stop cats from exterminating wildlife?

How to stop cats from exterminating wildlife?
2 by adrienchauvet | 12 comments on Hacker News.
Cats, even well fed by their owners, have a tendency to hunt everything that moves once released outside their home. It's estimated that free-ranging domestic cats kill billions of birds and billions of mammals annually. (source : https://ift.tt/VFJWKzI) We need a worldwide solution to stop cats’ extermination of wildlife. Of course, most people won’t keep their cats inside, so we need something, maybe a device attached to the cat to make its hunting fail. Do you have ideas to propose? Edit: Bells work, but only partially.