We treat our cats monthly with endectrid (flea and roundworm spot on) and use a tapeworm spot on every three months. One cat has recently developed a delightful habit of eating the rodents she catches. They are voles, not sure if the occasional mouse is also consumed. Is three-monthly tapeworming going to be enough or should I make it more frequent? We have young DCs so obviously I don't want them at risk of parasites.