What's really interesting is that slaughterhouses are major users of H1B visas.
https://www.google.com/search?q=slaughterhouse+workers+domes...
In the chicken processing plants near where I grew up, the workers were expendable. You're worked hard until you get injured and then discarded/fired/pushed out and replaced.
eg:
http://h1bdata.info/index.php?em=&job=MANAGER+TRAINEE&city=&...
http://h1bdata.info/index.php?em=Murphy-brown+Llc&job=&city=...