We use Advantage for the cats, and Top Spot for the dogs. Not sure why really, I just think the one vet happened to be selling the top spot at the time. I like Advantage better personally. The cheapest thing to do is buy the Advantage for big dogs, and get a suction/syringe measuring thing, and subdivide it into an appropriate portion for smaller dogs (or cats).
I don't remember the exact amounts at the moment, I just go on the web site to see.
Teresa |