I'm aware of that, MM. I'm just not sure how to approach the issue; I have no idea what sort of people they are apart from knowing they shut both the dog and cat out fairly frequently. This doesn't strike me as people that will be overly concerned, although I could be wrong.
I noticed earlier their garden would really easily be cat proofed and it's not particularly tiny. (It would be much easier that cat proofing ours which would need considerable amounts spent on making fences high enough etc.)