I hear Missouri has a terrible reputation for puppy mills, too. That has spread a little around my area (closest Arkansas county to MO). What I am appalled by is the sheer number of people who bring their car out to a parking lot on the main drag, and set up a sign and put the pups in a playpen out in the hot sun. I am sure that Wal-Mart does not know who is setting up in the far reaches of their parking lot. There is no way in hades I would buy a puppy from these people. But they always have customers. 
Karen
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insidious ungovernable cardboard