I've been reading your thread from the beginning Sue and am so very sorry for all you, your dad and the family have had to go through. I hope that now he is in hospital proper tests will be done to establish the causes of the weight loss. I am also worried about Ken's weight and have also been told that he eats well. I think, like you, I'll have to be a bit more pro active in chasing up doctors etc., to take this more seriously.
I hope you have better news today.
xxTinaT