Hey I'm looking for wee bit of advice for my dad he has certainly just gotten so worse overnight. He now doesn't know how to eat with a spoon, very sleepy and unstable on his feet. He is eating and drinking, there is no left sided droop or loss in strength but all of a sudden can hardly get up off couch and doesn't even know how to communicate all of a sudden. Can dementia just change so drastic in short space of time.