
If his phosphorous and other levels come down, I thought creatinine should follow. I had a girl in chronic kidney failure given 2 weeks, and I went to the dogaware site, and stuck rigidly to the protein levels and phosphorous levels by home cooking and a small amount of renal diet. It was hard managing a menu for her, but it became a 'way of life' for us. I managed to give her another good 8 months as a result. For example cooked egg whites are excellent protein, but low in phos. I found that just using the renal diet her levels continued to rise, so I used this in calculation with a home diet mainly.
I cannot recommend the dogaware site highly enough. It did initially mean that I had to sit down with all the info to understand the protein/phosphorous levels, but once I got the hang of it we were off. My girl was already in chronic failure by the time she was diagnosed. If Austin is in early failure you have a much better chance of preserving the remaining kidney function.
Good luck. With some work I am sure you can improve his numbers and keep them that way. Our girl had blood tests every month, or sooner if I was at all worried.
Kat