If your child develops a sudden disinclination to visit grandparents, it may be that the memory problems are upsetting or embarrassing. Kids aren't used to adults repeating themselves over and over (at least, when it's not orders and requests issued by their parents!).
And don't assume the worst if your child shows reluctance about visiting grandparents. It may not be the Alzheimer's that's bothering her at all; most kids get grumpy about visiting relatives sometimes.
