For the sake of the plot, choose whichever zombie type fits your plans the best.
that sounds like a magic zombie scenario and the aforementioned guidelines apply.
their dead tissue will break apart and decompose very rapidly, and dehydration will prohibit any complex movement after a few hours.
if reanimations are moving their dead bodies around without connective tissue or the fuel/cell requirements needed to work those bodily systems, that’s magic.
expecting non-magic zombies to be able to chase someone or gather in a horde is like expecting a car to run without any fuel, engine, or drivetrain.
the closest thing we have to a non-magic zombie but still similar to zombies in movies is rabies. the person becomes violent but extremely uncoordinated, aquaphobic, and then dies because the human body doesn’t function without the constant ingestion of water and fuel sources.
