Great info. Thanks!
I haven't tried the Vectra. I do know that with K9Advantix, the ticks and mosquitos don't have to bite to be killed. I don't worry much about fleas. It sounds like the Vectra should not be used around cats either, like K9Advantix.
Once Vectra has been on the market a few more years, I may give it a try. It seems like the ticks are able to adapt rather quickly to meds, so switching off periodically might be the best way to go.
You might have purchased Advantage instead of Advantix. Advantage is for fleas only.My Sam contracted Lyme while on Frontline so I know that it does not work. I switched to Advantix for Ike, but read on the package that it was for fleas but not ticks? I thought it was for both but maybe there's more than one formula and I purchased the wrong one. Anyway, returned it and bought Frontline again...but I'm not at all confident using it. I will ask my Vet about Vectrar 3D.