Need suggestions on how to help parents with failing health.

[Buckeye]

I know everyone is different, but my mother smoked for many, many, many years. I saw the slowdown in her like you are describing with your mother. Mom was about 83.75 when it started and she died when she was 84.75. She was not on oxygen but her health was very fragile (more than I knew) and she died due to complications of her COPD caused by incompetent care when she was at the hospital for an issue related to severe undiagnosed abdominal pain. If you don't yet have her talking on video, do it now. I so wish I had video'd my mom telling a story or something like that so I could hear her voice again. Don't underestimate how short the time may be. Older, lifelong smokers are much more fragile than you think, IMHO.