I saw this video today of Dr. Don Huber, Professor Emeritus of Plant Pathology, Purdue University, discuss lowered manganese and other nutrients plus reduced fertility in animals (including poultry) who are fed crops raised with Roundup. Of course only GMO crops can be raised this way, so I guess this makes it a GMO problem. There is also a marked increase in plant disease in said crops. The video is long (about 20 minutes) and very informative and Dr. Huber explains why these things happen. I'm sure most people here concerned about GMO feed already know this stuff but I found it very interesting and it answered some questions I have about the safety of GMO feed and food.