Sorry to jump in on this late. I feel for you immensely with your puppy. This group is all the kept me sane after all the hell I went through with Hank this summer.

I am blessed to work for one of the largest natural pet supplies companies in the world. We have a lot of homeopatic kidney support supplements that might work wonders for you. Here is a sampling of what we have available for your conundrum: http://search.onlynaturalpet.com/sea...ms=kidney&mf=0

If you're interested please PM for a coupon code to order with. Also, if your vet wants to give you a "prescription diet" run like hell. Ask them specifically what sort of nutritional balance they recommend. Such as protein, fat, fiber, etc. I promise you can find something like that in a quality natural food that will be less expensive and better. I helped a gal switch off nasty Hill's K/D food tonight. The first few ingredients in that food are brewers rice (by product of alcohol production) corn gluten meal (awful and useless for cats or dogs) and pork fat (ummmm). The rest of the ingredients were byproduct this and byproduct that. Ick. My dogs get a grain free salmon formula that runs $45 for 30lbs. The average 35lb Science Diet bag costs that much and that's not even the "prescription diet."