I found your thread
I still don't know the whole deal about what the results mean from a Protein test. I will wait for you to get the exact % from the Vet. I don't know how far you are from Cornell, but if you could go their to see the Specialist, I would do that. They are just very knowledgable and experienced, and they aren't going to do tests that aren't needed and you won't be spending a lot of money either.
I will be looking for your updates soon