It is hard to believe that his doctors allowed a man of his age to go through this without the benefits of a PEG system. He has enough battles to fight without nutrition being one of them, and at that, one so easily to maintain with a PEG. 4 cans of a protein drink a day will not be enough to stop the weight loss. He needs to be in the 1800 to 2000 calorie a day range to MAINTAIN where he is, let alone build himself back. While there may be many factors influencing his recovery. Poor nutrition is definitely one that will hold him, back. Given your description of his time line, I do not find his difficulties unusual. But if he does not get more nutrition he could be compromising other aspects of his immune systems abilities to defend his body, and potentially allow a different type of ailment to take hold of him while he is so weak from the treatments. His doctors need to step in and set this situation straight. Patient