The only observation I have on this subject is this. We always rotate a couple of fields of non-GMO corn hybrid (if there is such a thing). It is getting harder to find the seed. The deer will walk through the triple stack corn to eat in the non-GMO stuff. They will eat GMO if they have to. But we always notice more deer damage (very little at that) in the non-GMO corn. Maybe they know something we don't. This year, the non-GMO out performed the GMO corn, and stood better in the high winds we had. GMO stuff went to the ground.