Cindy
Find the nutritionist at the facility where he is being treated ASAP. I really find it difficult to believe that the staff where he is getting treatment are not concerned? Bob was overwieght when he started treatment and even though he had the wieght to lose the nurses and nutritionists were constantly on him to stay nourished or get a PEG. You NEED TO JUMP IN and find out what is going on. They may not know he is not getting nutrition especially if he is one of those guys who when asked how are you? reply "I'm fine" out of reflex. Really the next two weeks or so may be the hardest yet but if he gets through them with some nutrition IV or otherwise and some good pain management. When he finishes rads and chemo he will need lots of rest ( Bob slept for a week ) and possibly something to keep him from being constipated which can be a side effect of the pain meds. He really should soon be starting on the road to recovering. He is so close... Best to you and Dad.
Peace Denise