It does not serve any useful purpose to chastise anyone for not doing a certain thing. Feeding whatever to ourselves and the animals in our care is a choice. If someone said "you're going to die if you eat something," then it would be a case of that person making a conscious decision of whether or not to eat it. When we are talking about food and feeds that obviously don't kill if you eat them on a regular basis, then the argument is very subjective. All of us have prejudices, and is difficult to not bring them to the conversation, but we should never impose our personal thoughts on anyone. I don't like GMOs for most of the reasons stated (which may or may not be found to be true,) but I cannot say to anyone to not use something because I don't. Many here do not have the access, the resources and the want to feed anything other than commercial feed, or eat commercially grown foodstuffs. They are fine with it, and I am fine with them being fine with it. The discussion should be a discussion not an argument. A debate can either be "fact" filled or of personal experience. Ramming a point home generally does nothing to change someone's opinion, and just breeds more contentious posting. Ultimately, it ends with a locked thread or a deleted series of posts.
I am a believer in staying as close to organic as possible, when it is available, within my budget, and feels right to me. I won't turn down a steak raised on GMO corn because I think it will kill me, but I would rather the taste of a grass fed one.
In the case of what we are talking about here, chicken feed, I enjoy hearing personal experiences from people who have tried commercial, organic, or both, and hearing the results they have observed. If there is a good study done with a large data base, then I take that into consideration. I feed our chickens organic because I want to, as simple as that. I would feed Purina, Blue seal, or any of the others if that is what was only available, and what I could afford.
Sooner or later the big commercial feed suppliers are going to add lines of organics to their production because of popular demand. They will have been certified and blended by nutritional scientists that work for them. Might be a good choice since they can afford nutritional experts on staff to make the formula correctly. You can't mistrust all large companies and trust the local feed mill exclusively to provide a balanced ration. If the local guy can certify his/her mix, then it should be fine. If you are just taking his/her word, then you are doing yourself and your chickens a disservice, and cannot argue the point that your feed is better. I'd rather feed commercial feed than have some miller tell me that by feeding his/her organic corn only my chickens will receive a complete and balanced diet, or that free ranging makes up the difference.
Organic, commercial, GMO or non-GMO, soy, or soy free. It is up to the individual, if it even matters to them, to make the choice. And it is not necessary to beat into someone the reason it should matter to them. They are either interested in what you have to say, or not.
I will always say what I have found my chickens do best on, and will always continue to do research to find what "I" think is better, hoping it helps someone else make their decision easier.
This is a wonderful place to discuss and share our personal experiences with chickens. Helping each other is the best part of it, IMO.