Ok. If the pointer state is "cat alive", it will stay that way until the cat dies. If the pointer state is "cat dead", as far as we know, that's permanent. No problem.If the pointer state is "cat alive", it will stay that way until the cat dies. If the pointer state is "cat dead", as far as we know, that's permanent.
But how about the pointer state of your mood (related to brain dynamics). Now since it varies hour to hour or even minute to minute (for very moody people). Then it is right to say the pointer states of mood in brain can change hour to hour, minute to minute?
Of course, this just reflects the fact that "cat alive"and "cat dead" are not single quantum states of the cat; they are huge subspaces of the cat's state space. This will be true for any "pointer state" since any such state will involve a macroscopic object and any macroscopically distinguishable state of a macroscopic object (which is pretty much what "pointer state" means) will be some subspace of the object's full state space that contains a huge number of microstates. And the pointer states behave classically to a very, very good approximation, so the way to answer your question is to look at classical-type dynamics of typical macroscopic objects. And such objects don't "re-prepare" themselves.