So sorry about this sad news. If you don't feel comfortable with the diagnosis and prognosis, you might try getting a second opinion or at least a chest x-ray. If the news is bad, just try to live each moment and enjoy the time you have left. We lost two beloved hounds in four months to cancer and spending each moment with each one as if it was the most special time got us through it all. Best wishes from us to you and know that we are hoping for the best.