The final stages of lung cancer are ugly. My dad is going through them now. The docs tell us he has less than 2 months. He was admitted to the hospice unit at our hospital three weeks ago, they regulated his medications, and today he is going home. He is very sleepy and it is difficult for him to walk (he has mets in his hip), but he does still walk. He is a fighter and he is going to suck every bit of life out of this disease. He has a hard time talking for long periods of time because he gets short of breath. He uses oxygen for most of the day. The nurses at the hospice inn told us what to look for in the days and weeks to come. Maybe this will help you, they said that he will begin to sleep much more, he will fade in and out of consciousness, he will not recognize us toward the end, they said that they will probably know when his passing is immenent because his extremities will change colors. Like a bluish. Then he will only have days left. I know my dad is toward the end of this disease but it is still so hard for me to see it, because he is doing pretty good right now, but they said he could change overnight, so we need to be prepared. My dad is only 60 years old and is a non-smoker. I would highly recommend you contact the hospice unit near your family and get them enrolled. They would be a tremendous support system not only for your daughters grandpa but also for your daughter and anyone else in the family that needs emotional support or anything! I hope everything goes well in the weeks and months ahead for you, it looks like our family's are in the same stages, I will keep you and your family in my prayers.