I found out a week ago that our neighbor is growing some Round-up ready alfalfa this year. It's in a field that is far away from the rest of his alfalfa. He will be feeding this to his cattle, along with the non-GMO alfalfa. Not sure if he would ever be able to tell if his cattle react differently to it since it will be mixed with the other alfalfa. In the end though, it's probably going to be a rare thing that beef cattle aren't fed this stuff.