Most puppies are born with worms, but if you give Kai a monthly Heartgard Plus, you are essentially de-worming him with that. Heartgard Plus treats and controls hookworms and roundworms. If he had tapeworms, you'd most likely know it cause you'd see the "rice" looking worms in his feces.

I too, am wondering why the breeder didn't worm him? VERY unusual for a breeder not to do that.