Ah, GM foods. so far i think there has been no direct alteration of livestock other than slective breeding. I hear that scientist are working on pigs crossed with a typ of worm to produce bacon that is high in Omega-3 fatty acids to make it healthier
But genetic manipulation can open a whole pandora's box of problem, such as the accidental creation of a new virus or a 500 foot tall mega chicken that will go strait for Tokoyo as monters are wont to do..
seriously tho, i think with better research and cloning techniques, GM products will end up saving us some day.