[calais]

I have a pet cat, and as he is a rare pedigree breed, he isnt allowed out to roam. However he does get walked.

However, when other neighbourhood cats come to investigate while he is walking, a quick spray of weak white vinegar and water is all I need to dish out to keep my own cat safe in out own garden. Now, I havent had a single 'walk in' in more than four years. Its humane, environmentally friendly and cheap.

Might be worth a shot spraying a little around where your car is parked? Failing that, perhaps napthalene flakes?