grandmother with dementia refuses to eat. what can I do to get her to eat more?

Im afraid that as dementia progresses it is very common for the appetite to wane and for them to pouch (hold it in their mouth and not swallow) food.

Are there things that she will eat? Cake, biscuits and chocolate are often things that they will eat even when they wont eat anything else. At this stage you just have to get something inside them and not worry about whether its a balanced diet or not. If there is something that she will eat (like scrambled egg, for instance) then load it up with extra calories like double cream, or stir honey into milk shakes or yoghurt to make it taste sweeter. The GP can prescribe fortified drinks to help get calories in.

Im afraid that eventually, as she reaches end of life, she will stop eating anything at all.
Its what happens in dementia. Try not to argue about it.
xxx