My mother was diagnosed with dementia 10 years ago. Eight years ago I moved her into an assisted living / memory care facility. She now has developed congestive heart failure. Mom is 99 years old and will reach 100 years in the fall. She is frail, unable to do almost anything for herself. She walks using a walker and is on oxygen 24/7. I am not able to find much information on life expectancy for someone of her advanced age with these two conditions. How will I know when it's appropriate to bring in hospice care?