I for one never opted for radiation nor chemo. I did all that I could. There were no quarantees (of course) nor if it would be effective in his case.
I opted to enjoy my dog for one month with Predisone. It was a great month given and we soaked up all the time we had together. He did well on the predisone and it was like he would live forever...sadly he did not, but I was so grateful to have this precious time with him.
I hope your herbal remedies help. I have heard some amazing success stories.