Wife and I battled last 2 months with fleas on our beagle hound. We flea bombed the house and tried every flea shampoo we could find. Nothing worked. finally called our vet and they informed us that everyone was having issues this year. they suggested to use KnockOut E.S. in the house and to bring the beagle in. got a chewable tablet and within 2 days we haven't seen anymore fleas.