My 83 yr old mother was in the hospital last week because of dehydration. She has short term memory loss, heart and kidney issues. She was released Back to NH after IVs last Wednesday. She does not want to eat or drink hardly anything at all. She is back in the hospital again. Is not eating and drinking normal? At this point we are not sure what to do. She knows us when we are there but later probably does not remember what we talked about or that she is sick... does this happen often with dementia patients?