My understanding is that they're a terminal cross, meaning that the parents aren't exactly the same as the CX in terms of growth, but the combined genetics give their offspring faster growth rates. I could be wrong, it's hard to know what's accurate and what's outdated. Also, with a restricted diet, you can too breed and hatch from them. So, not GMO, just selectively bred for a long time.Well my thoughts are (and I'm no scientist) a broiler chicken isn't a normal chicken. In about 8 weeks they are almost too big to walk. So in 5-6 months how could they lay a egg to hatch? My thoughts are that is a GMO bird? I don't know just my thoughts? And I've been wrong before. I would just like to get back to something close to what God made.

Australorps, Rocks, Chanteclers, and many more breeds are all good dual purpose birds, giving you more meat than layers but they live longer and are healthier in general than the CX. There's also some specialty meat breeds from hatcheries or feed stores that don't get quite as big.