Synergy Labs Flea and Tick Shampoo PRODUCT REVIEWS PAGE 1 OF 1 Options Available: 16oz. Shop This Product Rated 5 out of 5 by 1 reviewers. Works Great! I have never had a flea and tick shampoo work as well this one does. Once I rubbed the shampoo in the fleas literally started falling off! by KrisMac on 08/08/2014 Page 1 of 1 1 Shop This Product