Extruded offal

Seriously what did you think that crap was made of? Sugar and spice and everything nice?

Say hello to mechanically separated chicken. It’s what all fast-food chicken is made from—things like chicken nuggets and patties. Also, the processed frozen chicken in the stores is made from it. Do you really want to know how it's made? Read on but only if you have a strong stomach.
This is one instance where "don't ask, don't tell" makes sense.