Source: https://www.amazon.com/BioSpot-Active-Care-Spray-Dogs/product-reviews/B006VA5PQW/?_encoding=UTF8&camp=1789&creative=390957&linkCode=ur2&showViewpoints=1&sortBy=byRankDescending&tag=fleascience-20&linkId=QZ4HVR5WLMCIBTHX