Guess which of these yolks comes from a healthy hen

chicken and kale

Did you know that chickens shouldn't be vegetarians, regardless of what the packaging says on your premium, free-range, organically fed eggs? Chickens are naturally omnivorous, and their healthy diet includes meat, as well as mealworms, beetles, grasshoppers, worms, and any other creatures they find in the soil. I've even heard of chickens hunting small rodents and snakes!

When all these sources are incorporated into a healthy diet, the nutrients they consume are transferred to the eggs and concentrated in the yolks. According to Mother Earth News, which conducted its own analysis of the eggs, and a more recent study from Pennsylvania State University, the eggs contain high levels of vitamins A, D, and E, and more beta-carotene and omega-3 fatty acids.