Interested to see vid and/or read an article on that. I’ll have to look that up later.
They are NOT easy to find. I found the first two ... there are 3 or 4. By the BBC: 50 cats were put under surveillance 24v hours a day to find out far they roamed from their villages.
https://www.youtube.com/watch?v=T0kOJNjpN-I
https://www.youtube.com/watch?v=N6i0T3vkzr0