@tsarstepan,
This med has no specified flavor.
I never had fleas; however, I live in a semi-tropical or tropical environment in so. FL, where they're everywhere and so far, we're good.
I've liked the Advantix II a lot. Currently, I'm trying Trifexis chewables on my dog now (2nd month)..and so far it's been good. I've read reports there are some people who have not had success as they've had dogs with adverse reactions.
Like with many meds, it should not be given to young dogs. I'd also be cautious with small dogs (under 5 lbs is
not recommended).