No first time I had given it to him ..he weighs 6.5 pounds.. But I did give him the right advantix for his weight .the vet said he could be having a reaction to the tick medication that's in the advantix .i called a few hours ago and they told me he's doing a lil better not shaking as much..I'm hoping there's no permanent damage
gonna call again in a lil bit to see how hes doing