Internal: Diatomaceous Earth is also an effective deworming supplement for pets. It helps to eradicate roundworms, whipworms, pinworms, and hookworms in dogs and cats. Add Diatomaceous Earth to your pooch or kitty's daily meals for at least a month to kill hatching eggs and worms moving around in their stomach. While it's more common to use Diatomaceous Earth as flea prevention, many people have added small amounts of DE to their pet's diet. There a numerous benefits a pet can receive from a consistent dosage of DE. Pet owners who have given their pets DE have found their pet has an improved coat, appetite, metabolism, and digestion.
External:Fleas and other insects have exoskeletons, rigid outer bodies, or shells. When these insects touch diatomaceous earth, the tiny abrasive particles damage their exoskeletons and cling to their bodies, absorbing the moisture until they dry up and perish. The particles may also kill some flea larvae, but it is not effective against flea eggs or pupae. Adult fleas may die as quickly as four hours after contact with diatomaceous earth.