There seems to be a debate over what liquid parraffin is parraffin here it is what y'all call kerosene, but there is other stuff = "liquid parraffin" which my vet told me to give my cat to get rid of furrballs. It is clear thick and non-smelly. So ask your USA vet what they would use on furrballs and you have your answer! Steve Pearce Kilspindie Glorious Perthshire Scotland