My 6 hens have the run of a half acre fenced back yard in an increasingly urban community. The orange yoke color is most prominent in the part of the year when there is an abundance of bugs and critters as well as greenery to feast on, in addition to an offering of balanced layer feed. The feed companies offer feed additives to mimic yokes from free ranging chickens. The color does not make those eggs "better" or "more nutritious." It does makes it harder to tell by looking if an egg yoke was from a chicken fed primarily feed with a colorant or a free-ranging hen.
