I have all my animals on Revolution. I have them on it because my Chins absolutely hate heartworm preventatives, they won't even sniff it. I asked this question in another thread, but I can't find it, so sorry for the repetitiveness. Should I have an additional Flea/Tick prevention, or will it be fine? Like K9Advantix, I'm not sure which ones a better one. I thought Revolution did the job for everything, not everything everything, but most everything, and a vet tech has her dogs on revolution and lets say frontline, for example. Plus, I'm in an area where ticks are common, etc, south stinks in that aspect. So should I have them on double the flea/tick? Thanks!