Made from food-grade diatomaceous earth, yarrow powder, neem powder, and eucalyptus oil – our all-natural flea powder is a safe and effective way to deter fleas from your pet, or to deal with an existing infestation. For prevention, simply sprinkle on your pet once a month during flea season (reapplying after baths or getting wet). To handle an infestation in your home, apply flea powder to your floors, windowsills, door sills, pet bedding, sofa, etc. and leave overnight. Vacuum in the morning and repeat once a week for 4 weeks.