Many of my nieghbors and chicken friends have asked me about my chicken feed. They want to know why the color of the yolks are different (darker) than thiers. I believe it is all in the protien of the feed. All free range the chickens and keep a light on in the winter. But they all feed comerical products, where I mix my own feed. There protien level is at best 16%, mine is at least 25. For anyone wanting to try this mixture, here is the recipe. 50 lb of barley (protien 11%), 50 lb of corn (protien 9%), 50 lb oats (protien 11%), 50 lb fish Meal [herring] (72.3% protien). Add the 4 protien values and Divide by 4 Equals about 26%. Then as treats they get the same mixture, I have added a bag of cat food to it, this cat food is 36% protien. So, thier protien level is much higher than any commerical product. Then you throw in all the bugs they eat, worms and whatever else they hunt up. Makes for RIGHT TASTY EGGS and the yolk color is much darker. Want to make your chicken happy try this recipe. By Christmas they will show you just how happy they are. And they will be giving you the eggs to prove it.