This spray for Dogs & Cats offers a pleasant and refreshing smell with clean, non-sticky active ingredients. This product has no known toxic effects from licking the skin. It does not contain any drugs or synthetic chemicals. Maximum FLEA + TICK is a natural repellent formulated by nature. It is a combination of Brazilian oils taken from certified forests and it acts as a natural shield against unwanted pests. The oils have been used for centuries by the indigenous people of the Amazon forest in order to keep pests from detecting a desirable scent from their skin. Maximum Flea & Tick is proven safe for use on most furniture, rugs & bedding. It could be applied to a dogs collar, that is able to soak up the oils.