Well, where did you
think zombies come from?
After a few months, zombies tend to get all... gooky. They drip brain on your toast. Their limbs and vital organs start to leave the vicinity of the body, often turning up in the worst places - your bath tub, or the closet.
That is why, every few months, new zombies are animated to replace the old. Of course, you should always have your certified zombie reanimator perform this delicate operation - doing otherwise voids your warantee.
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