We got this to give our Pug and Shih Tzu extra protection from the mosquitoes outside and the neighbor's flea infestation in our apartment. We have gotten herbal collars by a different company that I prefer, because it uses several more natural ingredients than this spray. The pets hate sprays, yet they are eager to get this at least when it is time for a walk at night or before sunrise. That way they are no overmedicated, so no internal tablet is needed. Comparable; cost-efficient!