
I had same type of blood results last July with my then 9 year old, after I was worried about her loosing muscle. The xray showed no obvious mass, just some fuzzy maybe areas!
I put her on a higher protein diet (as her Kidney results were excellent), allowed her to get a bit fatter than I would normally like, and she has been as bright as a button since! She is now 10 1/2.
A friend had a bitch diagnosed with cancer as an older dog, and decided to do nothing other than ensure her comfort, and she lived another 2 years, to about 11 or 12! I decided against any aggressive therapy, and will jsut watch that she enjoys her life and is pain free!