Hello sag, and welcome to TP.
Weight loss - yes it does happen to a lot of people. Sometimes towards the end of the illness when they can forget how to swallow.
Sometimes because they are quite simply not eating enough, or forgetting to eat.
Sometimes............well who knows. We have a friend whose weight plummeted at the begining of his illness, never regained any weight, but still managed to do all the things he had done previously. Lionels weight is dropping all the time now, although his intake of quality food is very good.
Of course, the opposite can. and does happen. Unexplained weight gains. I am sure someone will join the thread with something more positive.
Keep asking question.......it's the only way.