It is that season again. My dogs were on Frontline last year, and the formula was not killing fleas anymore, so my vet suggested the flea pill. Unfortunately, it appears to have stopped working as well. I have been getting my dog medication from my vet, and none of it was out of date. What do you use to stop fleas? We have treated the yard and the house, but we live on a farm and cannot treat twenty acres. One of my dogs is allergic to flea bites and now has hotspots. She has a cream prescribed, but I would like to free her from fleas. I appreciate any assistance you can give me.