Does the diet of a chicken affect the colouring of the
yolk or shells of the eggs it produces or its feathers?
Yes...just like in humans...and the color of many birds' feathers are
affected by their diet...flamingos get their color from carotenoids in their
diet...if you eat an excessive amount of carrots your skin will turn orange.
Peter Faletra Ph.D.
Office of Science
Department of Energy
The color of the egg shell is genetic. The yolk color is the results of the
nutrients involved and necessary for chick development.