Why Are Blue Eggs Blue

By Jessie Collins

Did you know that there are only 2 egg shell colors – blue (green eggs are a variation of the blue egg) and white. Brown, tan, cream, olive, etc. are due to the pigment that is deposited on the blue or white egg shell.

So what makes a blue egg blue? Blue eggs are due to a retrovirus that has transformed it’s RNA into DNA. This retrovirus is completely harmless and does not mean the chicken is sick or a carrier of a virus. The links below explain more in depth how this works.





The Vet Corner Groups are run solely by volunteers. If you would like to support the groups, please feel free to make a donation to the running costs of the groups and websites. We thank you for your kindness!

© 2014-2022 Rural Veterinary Outreach. All Rights Reserved.