† Could astronauts live on steak and eggs? Bad idea. Setting aside cholesterol issues, you’d be missing most vitamins. Fahey pointed out that even wild dogs don’t live on protein alone. “When they kill prey, they eat a smorgasbord of things.” It is a different smorgasbord than the one at Sweden House. “They’ll eat the stomach contents first usually.” Since the prey is usually some grazing animal, this is their side of vegetables.