My hens this year are laying eggs with bright French's Mustard yellow yolks. The yolks honestly look like someone has dyed them that color, they are that yellow. These hens are free ranging and are between the ages of 9 months to 2 years. They are fed a diet of Purina Flock Raiser crumbles w/ oyster shell mixed in (the only way they'll eat it), some Wendland's Scratch Grains in the morning and whatever they get from free roaming (insects, grass, cat food, food scraps, etc). Breeds are (not sure if all are laying): Salmon Faverolle, EE, Brown Leghorn, BR, Australorp, RIR. Red Sex Link, Buff Rock, OEGB, and Silkie.