Ugh well, too late now as we're leaving in 15 minutes, gonna use what I have, apply it at the campsite... at least they'll be away from any kitties for 3 days! And I'll be sure to watch them like a hawk even after they return home. I'll also keep an eye on rashes... thanks for the help...

Funny though, looking through reviews via google Advantix always was recommended over frontline, well not always but in general. Plus I read a LOT saying Advantix was not waterproof, but I'm reading in the booklet and it says it persists even after baths and swimming, so I assume it is.

Thanks, guys