I just found bits of short black animal hair throughout a 2.25 pound package of ground chuck in the 2.25lb package with 80%lean/20%fat that I bought from Wal-mart in El Campo, TX. When I shop for ground chuck I buy in bulk and divide it in 3/4 to 1 pound packages. I hoped the black stuff was paper and just on the outside of the meat, but it was mixed throughout the meat and it is hair. You can see several specks of hair in the picture. The larger amount of hair was pulled out and examined and put back on top of the package.
its not surprising, considering Walmart's meat comes from who knows where since they don't have their own butcher shop. Their meat comes frozen and prepackaged.
you get what you pay for.