"While waiting to buy Frontline Plus for his monthly application, our beagle ended up getting fleas. I purchased Sentry Flea and Tick Shampoo based upon the previous reviews and costs. We left the shampoo on for more than 5 minutes and then rinsed. All the fleas that were on our beagle were dead! We love this product...effective against fleas, coat is soft, and he doesn't get the beagle smell in a couple of days like most other shampoos we've used in the past. Highly recommend Sentry Flea and Tick Shampoo!"