My dogs have been getting fleas from our yard all summer long! I use Frontline Plus. I give them each a 1/2 vile of Frontline Plus every 2 weeks. One dose per month of a whole vile wasn't lasting a whole month. I got opinions on this from 2 different vets and they both recommended me applying the Frontline every 2 weeks. But, I didn't want to break the bank, so I'm giving them each 1/2 vile every 2 weeks. It really seems to be working.
