Cathy ~ The book "Seeds of Deception" also tells that story. Cows will tromp through the GMO fields to get to the good organic stuff. I think it's a little sad when cows are smarter than humans.
And (I think it's from the same book) I remember the little nugget that the invention of high fructose corn syrup in the 60's I think? (Or maybe 40's, I forget)
Was because the midwestern farmers had a glut of corn on the market and the government intervened and made up a way to use the farmers' corn so the farmers wouldn't go under. Rather than letting regular economic supply and demand run its course, the gov't intervened. And we know how well that usually works out.
I believe about 70% of corn or more in the US is genetically modified.
But don't quote me on that.