What makes eggshells brown




















The coloring of shells or bird has nothing to do with these factors, so you should go with whichever eggs you prefer and are in your price range. Whether you prefer to eat your eggs scrambled , atop a slice of avocado toast , hard-boiled in a salad , or fried atop a burger , you can't go wrong when choosing between brown and white eggs.

Both are delicious and nutrition-packed, making them an eggs-cellent choice. Confused by all the options at the grocery store? We can help. By Julia Chatzky. Read This Next. We love them all equally. News U. Politics Joe Biden Congress Extremism. Special Projects Highline. HuffPost Personal Video Horoscopes.

Follow Us. Terms Privacy Policy. All rights reserved. Tsekhmister via Getty Images. True or false? White-feathered hens lay white eggs, and brown-feathered hens lay brown eggs.

Chickens have earlobes, and they can predict the future. Getty Images. Different regions feel differently about brown vs. Just ask New England. In New England, The coccidiostat Nicarbazin, administered to hens at a dose of 5 mg per day, can result in the production of pale eggs within 24 hours. Higher doses can lead to complete depigmentation of the eggshell cuticle. Viral diseases, such as Newcastle and infectious bronchitis, affect egg production in poultry.

These viruses have a specific affinity for the mucus membranes of the respiratory and reproductive tracts. Because the virus directly infects and damages the reproductive tract, the signs of disease are manifested indirectly in the product of the tract, the egg. Thus, total egg numbers decline and eggshells become thinner and abnormally pale and have irregular contour.

Internal quality is also adversely affected watery whites. These egg production and quality problems can persist for extended periods. Most eggshell pigments are located in the cuticle and outer portion of the calcified eggshell. Premature arrest of cuticle formation or release of stress-related hormones epinephrine will result in the production of pale brown-shelled eggs.

Age of the bird, use of certain chemotherapeutic agents, and disease also can affect the intensity of pigmentation. No one factor, especially infectious bronchitis, should be diagnosed as the cause of the reduced pigmentation of eggshells until all possible differentials that may affect pigmentation have been considered.

Baird, T. Solomon, and D. Poultry Sci. Burley, R. Vadehra, eds. The Avian Egg-Chemistry and Biology. Cook, J. Hughes, B. Gilbert, and M. Hunton, P. Kennedy, G. Lang, M. McCartney, E. Egg Industry August : 12— Mills, A. Faure, M. Picard, and M. Marche, and J. Nys, J.



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