Cats and dogs need regular deworming, say vets, but how often is “regular”? This all depends on their lifestyle and how much you are using other methods to limit the chances they will get worms. If you’re wondering how often to deworm your pet, then consider the recommendations of veterinary parasitologists – and also the following questions: Does it run freely? Does it hunt? Does it eat carrion or faeces? All that can help you decide whether you need to give your pet worm medicine once a month or closer to once a year. Outdoor cats naturally have a higher risk of picking up worms than house p…