Raymond from Albion writes
We recommend using Sentry Capguard Flea Tablets for Dogs and Cats along with another product such as Frontline. The Capguard will start working within 30 minutes, but will only last up to 24 hours per pill. If your pet gets re-infested with fleas, you can safely give another dose as often as once per day.
Answer last updated on: 07/25/2017