I don't have a cat, my neighbour does and she just loves to bypass their lovely garden furniture and come over and tear the living daylights out of a bench that was made especially for me, it has been suggested to me, citrus, squeeze and orange all over the bench - ants love that!! and leave the skins around it, didn't work, I watched the cat playing with the skins, I have tried ground white pepper and 'not on my lawn' but nothing deters the little monster - I also heard Lion dung works - might have to pay a visit to the zoo soon ;) I'm not a cat lover so I would be interested to see how you get along