I know, catch the damn thing..................................then shave it!!!
The old bag will have to keep poor kitty in side so that it doesn't freeze. YES problem solved. Or (thought just came to mind) pee on the damn cat and It will get the pict. (sorry felt compelled to say these) Okay seriously that's mean, but I had to say it sorry. I do like AquaFox's idea though or Rodney's third idea. Be careful with the rue plant you don't want it annoying your own cats.