We live in the suburbs of Utrecht .
The District we live in is called Leidsche Rijn. This used to be a landscape for agriculture. You could find all sorts of fruittrees in this area. We have a nice house with a garden which is surrounded by a fence because we don't want to get our cats wander outside. On the top of the fence we built a Cat-Pet-Alert.
It is a small tiny thread with very low voltage which keeps our cats within the garden.