Diatomaceous Earth controls Fleas around your pets and small animals and around the home. Diatomaceous Earth is a fine powder also known as silicon dioxide, which consists of aquatic microorganisms. As the insects crawl over the fine powder, their waxy outer protection is scratched, causing them to dehydrate and die. Diatomaceous Earth is non-toxic to human and pets and will remain active as long as it is kept dry. Diatomaceous Earth is an odourless non-staining powder. Can be used safely around dogs, cats, puppies and kittens under 8 weeks of age, small animals, fish and birds. An excellent product for your kitty-litter box. Diatomaceous Earth is an effective preventative against fleas. For indoor use when fleas are already present, lightly coat the infested area where insects are found. Vacuum after 4 days and reapply.