Deworming medications are available as tablets, capsules, granules, chewables, liquids, and topicals. Puppies and kittens are born with worms and should be dewormed early. Waiting until 6-8 weeks of age to worm puppies and kittens allows them to spread worm eggs that will contaminate the soil and re-infect them. Puppies: Deworm every 2 weeks from 2 weeks of age to 3 months, then deworm monthly until 6 months of age.