i started using it when i sent my chihuahua and pom to the groomers and they came home covered in fleas!!!
i had been using frontline but i have to tell ya i love it! the smell was not as bad as people have said and it works great even when you give them a bath. i love it and i plan to still use it....its not to say i wont be having probs this next time but it has been good so far.