Someone on here reccommended Petshed.com, and that is where I have been getting my Frontline Plus. It seems to work just as well as the ones from the vet, we haven't had any problems. And it was about half price. Although now, our vet is saying Advantix is better, so I am frustrated, I don't know what to believe. I do have 2 cats, but they are scared of Cesco, who lives with them and is now on Advantix. So i don't think there is any way they would get in contact with it, or him. But anyway, yea petshed.com is pretty good so far, fast shipping and great prices, and it does look exactly the same as the vet stuff.