Years ago, I was in a production facility, and a worker threw some trash into a barrel of product destined for a local pig farmer. The worker thought his actions were acceptable because of the common belief that pigs eat anything.
Over the years, many production facilities have taken products and by-products failing to meet finished product specifications and have sold them to “pig farmers” or other animal food companies. As I witnessed, sometimes employees would throw foreign material into the “pig food” or “animal food” container. Often, this product would be offered for “free” to farmers, as long as they picked it up frequently. Commonly, these containers on the back dock or in a walk-in refrigerator would not be labeled. Workers would throw trash in them because they were not trained about the risk of mixing trash with potential animal feed.