Contamination of meat products with intestinal contents or other sources of contamination happens regularly in poorly run meat plants. 

Poultry in particular is quite prone to cross contamination. The XL Meat and Maple Leaf recalls are specific examples of that.

https://www.google.ca/#q=xl+meat+recall&*

https://www.google.ca/#q=maple+leaf+meat+recall&*

https://www.google.ca/#q=hamburger+recall&*

https://www.google.ca/#q=beef+recall+canada&*