Lol, I had ag. science just last semester.  We went and judged livestock also, but we never raised chickens.  
But I've been told about the chicken parts ever since 2 or so years ago.  It did stop me from eating it, but only for a little while.  I said.  "It's good and I'm hungry"  So I ate it.  I also found out that sausage is ground up pig parts and put in an innard lining.  Yea, if you think about it, it's gross, but it's good.  So I eat it.