What Could Large Bowel Movements In A Person With Alzheimer's Disease Indicate?

my mother is in hospice late stages of alzhimer she is just taking in juice and maybe 2 boost a day the nurse gave her an inemia and she had a bowel movement that was huge and solid after she had the bowel movement she started talking a little ..the last 3-4 days she has not been talking we were wondering how she can have such a bowel movement with not eating thanks would appreciate any insight.