I think I would have issues with the naming, too.

Anybody has read Temple Grandin's biography? They came out with a kids' version last year (http://www.amazon.com/Temple-Grandin-Embraced-Autism-Changed/dp/0547443153) which should be appropriate for gifted kids K and up. They talk at length of her work making cattle raising more humane, and there are lots of facts about the meat industry.

She explains that she tried to go vegetarian when she was a teen (she *identifies* with cows), but got sick without meat in her diet.