That is true @varidgerunner I agree that the brooding of chicks is considered natural selection. But that and disease run just about the only natural selection they have. @cubalaya Aren't the wild chickens in Hawaii descended from old English game? If I remember right,old day cockers on Hawaii couldn't really migrate with fighting birds to hide them when cockfighting was outlawed on Hawaii. So the cockers just released their birds into the wild. Not doing much with them anymore. But that would've killed them,as roosters would've killed each other,and any surviving hens would've only had a select few roosters to choose from to breed with...the ones that either won or hid. That would limit the genetic diversity,and I really don't think there would be thousands like there are today on the islands. Unless the hurricane released other caged laying flocks and commercial egg flocks maximizing genetic diversity.