Canada Vet Direct

I'm looking to buy Smudge some more K9 Advantix, but it's so expensive so I'm doing some price searching. I found a pet site called CanadaVetDirect.com with some really good prices (6 pack of K9 is $54.) Is anyone familiar with this site before I give out my credit card information? It seems legit but I want to be sure.

Thanks!