I'm so sorry that you are going through this horrible time right now. Read my biography…I have been through/going through fanconi syndrome with my pup. Let me ask you...was your dog diagnosed with fanconi? Please tell me exactly what your vet said. Has your dog had a BLOOD GAS test done yet? These are important questions that I must know the answers to, before I can help. Thanks!
P.S. I must tell you that I am not a Dr/Vet...but I do have experience and speak to Dr. Gonto almost on a weekly basis. Dr. Steve Gonto is the one that invented the protocol for Fanconi.