I hope not!! I was in a similar situation when one of our hounds was diagnosed with lymphoma after I found a mass in his neck. A fine needle aspirate was done on his back Lymphs, and it came back positive. However, because of his age, we all (including our trusted vet) felt it best to leave him untreated and fact is he lived a further 6 months completely as he'd always been, to the point I started querying the diagnosis. In the end, his system crashed and we had to give him peace. Tragically, but he was an old boy.