Linda from Fairview, Tennessee writes
Happy Jack Paracide Flea and Tick Shampoo is designed as a knockdown product and is most effective on target insects at the time of use. This shampoo may repel some insects for 2-3 days after application, but for the best long-term control we would recommend pairing this with another long-term flea and tick control product, such as ZoGuard Plus for Dogs or for Cats. You must wait 7 days between applications of Happy Jack Paracide Flea and Tick Shampoo.
Answer last updated on: 01/29/2017