I used Frontline Plus for a while. I got a really good deal from this website:
www.petguys.com
Then recently K9 Advantix has a really cute commercial, about bunch of puppies went to a camping (summer camp) trip. It just stole my heart. It's my favorite commercial. Since then, I use k9 Advantix instead.
Both have almost same price.
But I do notice that, after I put K9 advantix on my hounds and if it hasn't fully dry yet and they lay down on our leather couch, the chemical could actually break down the first layer of the leather! It doesn't happen when I use Frontline.
Anybody knows what's wrong?
The good things is later on I have a reason to buy a new couch (a much more comfortable couch!!).
Another thing, K9 Advantix and Frontline Plus is the only 2 brands that really work for my hounds.