Oops, Just kidding. It's AdvanTIX that shouldn't be used around cats. Although, as long as your cats don't lick it off, they should be fine. I don't own cats, so I don't know how often cats lick dogs. Lol

I still use Frontline... I've never had any problems with it. Just hear of them. I'll check into using the ACV for cats.

EDIT: Okay, I just read of people using it for cats. You can google information about it. It's also spoken about in a couple of my natural healing books I have. I have yet to use it, but you can also put a few drops in their ears once or twice a week and it will help prevent ear infections. My mother in law told me it is definitely a taste you have to get used to, or maybe I would start drinking it. lol