Here is a better source for GMO information. It is more recent than the other lists.
http://www.nongmoproject.org/learn-more/what-is-gmo/
As far as food for human consumption goes, there is NO national (US) requirement to label GMO products one way or the other. Several other countries require the labeling of food that contains GMO, but AFAIK, they do not label foods without GMOs as "GMO Free." I haven't heard of a company volunteering to label anything as "Contains GMOs", but some do label things as GMO free (different ways of doing this) for MARKETING purposes (the same way "new" might be on the package of a "new" cereal). As far as I know, "Certified Organic" is supposed to mean it contains no GMOs -- and that's about as good as it gets for consumers. But big business is throwing a LOT of money around to stop regulation on the labeling of GMOs. In the most recent election, California had an initiative on the ballots to require GMO labeling, and big businesses contributed over $1 per day to advertise against it. Some of their advertisements were pulled off the air as they were not truthful. As of the current count of the ballots, the initiative failed.
It is also important to consider that food for animal consumption is even less regulated than food for human consumption. But the optimist in me is willing to believe that if animal feed is marked as "organic" or "GMO Free" then the manufacturers are being truthful and diligent.
Most commercial chicken feeds get their protein from soy, so they probably contain GMOs. Most chicken feeds contain corn, so most probably contain GMOs. I found a commercial chicken feed with Canola as the protein source, most probably that contains GMOs. And anyone feeding their flock commercial alfalfa is likely feeding them GMOs with that.
But do note the absence of things like "wheat" and "rye" and "oats" and "barley" from the GMO crops lists. At least for now.
Oh, fooducate has an app that lets you scan barcodes of grocery store products to see if they contain GMOs. Of course this doesn't work at the bulk bins or the feed store.
I am in Nebraska and the only feed I have found so far is Fehringer Farm non GMO, and it is 400 miles away, the very west end of Nebraska. I can get a 50 pound bag for 20$ and the shipping is 25$. Hiland Feed in Ohio is also non GMO, but is further away for me.
Mansanto owns the patent on their GMO products, and they hope to pollinate every bit of the growing area.
It makes me sad that I cannot buy NON GMO feed for my girls where I live.
Thanks for your info.
My previous post reply is confusing in placement
I apologize. This one is to rectify that.