The poultry layer eggs bought at the supermarket are a varied lot, which is no surprise as our poultry layer chickens, don’t look alike. The eggs in our cartons are as unique as the layer chicken that lay them in the poultry layer farming.
So why are eggshells different colors? Qingdao Farming Port professional team studies and shows the reason for it. Believe it or not, all layer chicken eggs are initially white. The color of the eggshell is determined by the hen’s genetics, ie, her breed. The formation of the poultry layer egg takes approximately 26 hours, and 20 of those are necessary to construct the shell, which is made almost entirely of calcium carbonate. Pigment is added during the last four to six hours of this process.There are a lot interfere with egg color.
1,On the most basic level, breed determines the color of the egg. But, each hen has their own genetic makeup, and don’t always follow the rules.
2,If a hen is stressed, she’ll release a hormone that ceases the cuticle formation and so her shell color will be pale.
3,Some viral diseases can decrease shell color.
4,Certain medications can impact pigmentation.
5,The size of the egg can affect color, too. The hen is genetically programmed to make a certain amount of pigment. If she lays a very large egg, there’s less pigment to go around. As a hen ages she becomes less able to synthesize the pigment and so her eggs will lighten over time.
6,Speckles and streaks are formed by an egg’s slow rotation through the chicken’s oviduct.
7,Additionally, if an egg is stalled in the uterus, it may become darker because there will be more time for the application of pigment.
8,Other factors that can influence the eggshell’s formation include health status, housing conditions, water quality, environmental temperature, and availability of vitamins and minerals (especially calcium, phosphorous, and vitamin D 3 ).
In fact, there are no major differences between the eggs produced by different chicken breeds. There’s no nutritional difference between white eggs and brown eggs, which are more expensive.