There is a lot of controversy about Revolution. I just can't figure out what it is. My friend went to her vet up in NY and requested it for her dog, and she said the vet shuddered and said Revolution is no good, but wouldn't say what was wrong with it. I mean I know it is basically a poison you put on your dog, but isn't everything else? Like I said before, I've used it now for over seven years, maybe that was one of the things that caused Busters seizures???? I guess I'll never know. Maybe I'll switch to Heartguard for the heartworm prevention and only use something like Frontline if I ever see fleas. I really hate putting poison on my dog every month, but I don't want to deal with fleas either. That is why I liked the Revolution, because it took care of everything in one dose. Does everyone here use flea control every month, or only in season, or when they see fleas? I just used up my last dose of Revolution this month, so I'll have to make a decision on what to try. I guess all meds carry a risk of something. I was reading some info on the wormshield and read that collies are at more risk of side effects from using that product. It just strikes me weird that certain breeds are affected differently. :roll: