I bought K9 Advantix from a seller, http://sierra***.com/
The tubes did not have EPA reg. number or warnings. The box was flattened in the package that arrived and the tubes were in a silver blister pack, not the individual tubes in silver as usual. The package was mailed via the post office, from Australia. I will try to get a refund but am not expecting it. Who knows what chemicals are in it, and where it was counterfeited. Probably China, and they don't care about pet health!