Cats are at risk of exposure to a number of parasitic worms such as roundworms, hookworms and tapeworms. These internal parasites are easily passed from cat to cat if they step in soil or litter where an infected cat has been. Your cat could also get worms from ingesting feces from infected cats. Kittens can get worms from their mothers. Some of these worms can be passed to humans as well so in addition to protecting your cat, you need to protect your human household members too. There are a number of over-the-counter dewormers but they may not prevent transmission or kill the specific worms your cat has been exposed to. The best course of action is to set up a regular deworming schedule with a medical professional including regular stool testing for worms. Make an appointment with your Ashburn, VA vet to learn more and set up a comprehensive worming plan.