@farmerman,
It's easy to forget about nutrition (which almost sounds crazy) (especially since all of us love food) but during and for months after pneumonia I barely had any appetite. Not eating made me weaker and weaker, until it dawned on me I needed something so r. G'bag got some Ensure. I couldn't always finish a can but it did make me more alert and less likely to sleep all day. I lost a ton of weight but fortunately gained back about half.
I am very concerned about CI, because of the leg weakness, our bones are not what they used to be and falling can be a huge setback. I hope he's online and follows up with his doctor. My friend's Mom was 96 and used some physical therapy to help her with her balance. The good news was that she didn't have any more falling incidents, however about 6 months later she succumbed to a stroke. None of us will last forever, but I don't wish to be a shut in voluntarily.