Natural Selection?

This is what you are eating and if you think this is natural I have a some coastal property in Arizona to sell you. The cattle are bred through picking those who have a gene that does not work, it turns off and on muscle growth. The cattle can not breed on their own and would not be able to function correctly within the cause and effect of nature. Human beings have been selectively breeding cattle for probably 10,000, new archeological findings have found….so….Yeah, that gene turned off all by itself…right? You know nothing in nature is a closed system right?