Ok so I know it sounds impossible . But I only have 3 chickens (Rhode Island red board Rock, and olive egger) and my only olive egger has changed color.. I used to get these beautiful colored eggs and now they are tan-ish with speckles.. for a long time I thought she just quit laying or was laying somewhere else (free range )but I found her sitting in an unused coop and sure enough her eggs changed. Is there any reason or explanation for this ? I miss my pretty eggs.