Is there anything other than surgery I can do for bladder stones in a 14-year old Lhasa?

X-rays reveal the dog has stones and recently I've noticed some blood in his urine. I don't want to do surgery because of his age. He has additional health issues which I feel would make surgery risky. The cost would be over $1500. My cousin had a dog who had the same surgery. The stones reappeared after one year and the dog subsequently died. Is there anything I can do? By the way, he doesn't seem to be in pain, is eating well, and is eager to play. I feel guilty by not electing to have the surgery done, but I had another Lhasa who lived to be 17 after spending thousands of dollars to keep her going. I can't do this again.