I'd probably sooner give them a low dose of Colloidal Silver or Humaworm (or similar) after DEFINITELY doing my research into the effects of silver and the Humaworm herbs on cats!!

MMS... might be a bit extreme, but it may work (I'm a little new to it so I can't really say)

I would also of course just look into normal medications for something like this, as parasites in animals is so common it's usually quite simple to treat even conventionally.