There was a survey carried out in school kids last year, and the very sad fact is that some of these kids didn't know that milk came from cows and chickens laid eggs
Thankfully my kids are a bit more clued up that that 
Whatever happened to the 'hunter/gatherer' bit in our genetic make up 
except where I work - the kids are well informed... by me! And, on the whole, interested and fairly understanding.
Its the other staff who are "oh, you can't do that!"
I was offered some chickens by a colleague, as he (who'd got them from his child's school incubation project) was under the impression that yellow chicks were all girls and brown ones were boys. I said "ok, but if I end up with cockerels, I'll eat them!"
... Looks of horror from around the room!
I just reply, like most of you by the sounds of it, that at least my meat hasn't had a short life in a dark cage in Poland, or wherever. I know where its born, what its eaten, and that it has had a life of care and love in the sun...