GMO stands for genetically modified organism. My family and I are organic and non-gmo, and because of this we are wanting to raise our own "organic" chickens, we have much experience in raising them, also. Since most chickens are raised on gmo feeds or are even genetically modified themselves we've been having a hard time searching for chickens that are not. I am needing roosters and hens that have been raised organic/non gmo (preferably from a completely non gmo genetic history). Any breed of chicken larger than the bantam/banty breeds is okay. We are located in the central Oklahoma area, if this helps. If you know of any breeders please reply ASAP. Thank you!