When I first got my puppy,I wanted to keep fleas at a miminum. I was told either to get the pup Frontline,or this pill that the vet had offered.I opted to get the pill.The pill is given to a dog once a month and it is supposed to keep the fleas away by displacing a odor that fleas can't stand.Has anyone heard of this kind of pill? I might be wrong about the odor thing,but I don't thing so.Also,is this pill safe or did I get bad advice from the vet?