German Shepherd dog

I apologize for the previous blank post.

Does anyone know where to get the Royal Canin Wet Puppy food for the best US$$$?  I currently feed the dry GSD kibble,  but my dog is not really interested.  He has been interested for a couple days on everything I've tried, premium foods, then he loses interest.  I've kept him on RC GSD for approx 4 weeks now, trying not to change, but he has no interest at all unless he is extremely hungry or has been working.  So, I am considering adding puppy wet food to spark his interest.  He also could stand to gain a little weight.