What specifically are some people worried about with soy in chicken feed? Is there something inherently bad in the plant itself? Or is it just because soy is usually one of the most heavily GMO-ed, pesticide crops? I guess I'm asking, if I have a local feed producer that includes soy in his product, but the feed is certified organic (therefore non-GMO)... would that resolve all fears? Or is there something else I don't know about? Thanks.