I try not eat anything that I could not kill with my bare hands, or that would eat me. Sometimes I feel weird about feeding my cats shrimp, because it isn't something they would encounter in the wild. Or cow, because they could not take one down on their own. Cat food should be mice, sparrows, spiders, moths, flies, squirrels (maybe), small rabbits... My diet, left to my own devices, would consist of fruits and vegetables, cat or stray dog, the odd retarded fish, eggs, electrocuted birds, beaver, skunk, hedgehog, and maybe roadkill.