Here's a thread for you to browse thru. Lots of info in here for seniors.
Chronic Renal Failure in Senior
Banshee's went up to 1.8 and then back down to 1.2. First, was it a fasting bloodwork? Second, my vet said (and it's exactly what happened) that the levels will go up and then often level off as the body adjusts.
I feed Banshee a RAW diet. If you decide to go that route, I can send you the spreadsheet I made to help track levels. There are also many recipes and food suggestions on
https://www.facebook.com/CRFDogs/notes
Have a chem17 done. It will tell you phos and calcium levels which are important.