This Flea Powder is gentle on both Pets and their owners. It contains odor absorbing organic powders and clays, Diatemaceous Earth Cider Vinegar Powder, and Calendula Powder. Apply as needed, avoiding breathing the dust. The ingredients are all non-toxic but the DE has a caution on it about inhalation. DE can be applied on its own, but has a 'chalky' sticky feel on hands which isn't all that nice. This powder feels very smooth to the touch and smells nice.