My 95-year-old mother is in end stage dementia. She has been in an aged care for 5 years now, has not been able to speak for about 3 years, is no longer mobile in any way (for 2 years), cannot toilet herself, feed herself, drink fluids without assistance, and sleeps 20-22 hours a day or more (at least 12 months). She is wakened by staff to be fed, and does manage to eat what is given most of the time (all meals are pureed).
Last week, she refused all food and fluids for 2 days and would not wake. Then, just as we were starting to really be concerned, she woke up and ate a full breakfast. As she sleeps almost all the time, and doesn't even wake when we visit, or acknowledge us in any significant way, should be instruct the staff to stop waking her for meals, and only feed her if she is awake? (Not even sure what their response would be to this request, but I feel it is wrong to be extending her life as it is.)
Please make sure you have POA for her care and her financial affairs. Does she have a DNR - that will probably be a need in the near future. Without one, her facility will be probably need to send her to the hospital for dehydration and malnutrition in the near future.
You will need to instruct them if you prefer otherwise.
Please tell me that this poor woman is in Hospice care for her comfort as her life ends. She has clearly gone thought enough torment to this point.
I would just let your mum sleep, and bring hospice on board if they're not already as they will be able to answer any questions you may have and will keep your mum pain free and comfortable until she leaves this world for the next.