Hardly anything natural about the animals (or even fruits and vegetables) we eat. They’ve all been specially and quite artificially bred for our consumption.
I recently heard a comment on a non-topical podcast along the lines that "everything is GMO". Your favorite herloom tomatoes at the farmer's market, the corn, the lettuce, your dog, the beef, your cat, yourself. GMO is "evolution, faster" or at least customised in a lab. If one thinks I should have a fundamental problem with this view, I'd like to hear why.