Unwelcome visitors

Certain visitors in one's garden are just not welcome. The usual suspects are slugs and snails and the occasional cat who thinks it owns the place. However, this year I have had repeated incursions from dogs, foxes and squirrels, whose antics border on sheer vandalism. I initially put bark down to discourage them from going on the borders, then upped the ante with rose cuttings - all to no avail. Finally, a friend of mine has given me a good tip for keeping them off - teabags soaked in Olbas oil. So far, it appears to have worked...