Hi,
I am so sorry for your father, with such a illness still smoking? I don't understand. My husband has stage iv colon cancer also with mets to the liver, he has no pain at all. he losts 60 lbs and gain 18 back, he is in good shape. I am monitoring everything he eats, and he talks 20 minutes of walk morning and night, so far it's been good. he has 2/3 of his colon resectioned 1/2 year ago. we are focus on his liver right now, currently not operatable. but I am very positive. doctors said he only has 1/2 year to live, he is way passed that time. there is definately hope. but your dad needs to cut out all his back habbits. how old is your dad? he needs to have hope to live. good luck.
Bao