I'v never bought advantage products before and I was having 2nd guesses after I had already applied it to my new kitten. I kinda had a bad feeling ordering from Amazon but saw there were a lot of reviews as well as a high rating and that the store was called Bayer Animal Health but I thought nothing of it so didn't think to look deeper into it. And sure enough as real as it looked packaging, instructions n all, I see it says "Made in Germany" and doesn't say anything like registered in US so idk