Revolution, Comfortis or Sentinel?

[kaelti12]

We use frontline, it works well for us. My mom also uses it for our county animals(cats and dogs) and it keeps fleas off them, even when they wander in the woods.

Oh as for heartworm, our dogs get a shot every 6 months now(this was a new thing to me this year). Much easier then me having to remember to give it to them, since heartworms are really bad here.

[valerietag]

anyone able to tell me what med whether oral or topical will keep fleas from biting at all and kill them on contact?