The two types of worms which most commonly affect cats are tapeworms and roundworms. You should worm your cat every 3 months as wormers are a reactive medicine and will only kill worms, eggs and larvae which are actually present, they do not prevent new infestations. Cat’s who like to bring back little presents in the from the fields are especially at risk from worms - so keeping on top of regular treatment is key. Browse the best wormers for cats including palatable tablets, spot-on wormers such as Dronspot and pastes/liquids. Plus, don't forget about flea & tick treatments for your cat too!