answer:I used to raise chickens. The shell color is determined by the breed – some lay white, some brown, some green, pink, or blue. The health of the chicken can be observed in the quality of its egg. The yolk should be a dark yellow, almost orange, and should stand up firm, like perfect half-dome, not sag down flat. The white should be bright and opaque and likewise should not run all over the pan in a watery fashion.