For those of you who use products like Revolution, Advantage Multi, Frontline, etc. do you treat all year round? I live in Toronto, where its currently below freezing and was told that I only need to treat June-November as fleas cannot survive these harsh temps. That doesn't seem right to me though because it gets warm long before june. Sometimes by early april it already feels like summer. And to top things off my dog is constantly exposed to other dogs. As a huge bugaphobe I have been paranoid since I stopped treating in Decemeber. Thoughts?