I'm in SW Florida, and especially this time of year, if you go outside, you get bit by something! Kinda hard to tell what. I know I have not seen any fleas in my home, or on my dogs. They both get a once a month Revolution treatment. But when outside, I get bit by all kinds of things, skeeters, no-see-ums, fire ants, horse flys, and the occasional fuzzy caterpillar. And with the cat woman next door, I know there are fleas around. None of her cats get any kind of treatment. She just pours food outside in a bowl, and they come from everywhere. There have been a few mysteriously disappear, but there are too many, and kittens dropping too. So sad.