Drontal puppy suspension is for the treatment and control of roundworms ascarids in particular toxocara canis of puppies and young dogs up to one year of age drontal puppy suspension will also be effective against hookworm ancylostoma caninum whipworm trichuris vulpisthe best you can do is to kill any worms which may be present on a regular basis to avoid worms reaching maturity and affecting your pets health and to reduce public health risks thats why puppies should be wormed ev