Haven't read this whole thread, so this may be a little out of context. I know many people would say to involve kids and I don't judge that, it's up to each family. I can tell you this however, from my own childhood. My father let me watch while he slaughtered pigs and also a few deer. I have to say that it completely traumatized me and affected me for life. I never ate meat again, literally, I am still a vegetarian today. I do realize that I was and perhaps still am more sensitive about animals than your average person, so I'm sure I'm a rare exception, but yes, it deeply affected me. Once I saw the "in between" stage from pig pen to table, I was just horrified. But I've always been an animal nut, admittedly. You might even consider starting off with a pre-screened (by you) YouTube video of a chicken processing, and show your kids that before you show them the live thing, so you can gauge their ability to handle it. My father never intended to traumatize me, he was simply trying to show me the ropes. But you never know how different kids are. Good luck!