Olive oil, olives and olive wood, not homeopathy, but indulge me
Some cats adore olive. I had a cat who once manged to break into the fridge (door would not close properly) and steal a bad of olives my flatmate had left there

, another of my flatmates accused her of breaking into the fridge and stealing his sausages. Ahhhhh, the joys of cheap rented student accomodation....
Seriously, this is something many cats like and will roll around on it in escacy. If the cat will eat olive oil it may well be an alternative to the petoleum stuff.
And keep down the amount of stuff which can get into the digestive system by regular grooming.
Janyce