I have an EE that has always laid tan eggs. Over the past two weeks I haven't been finding her eggs. I thought she was hiding them and have looked everywhere. Today I caught her in the nest box and watched to see if she would lay. I heard her egg drop so I know it was hers but now her egg is white. So all this time I thought she wasn't laying, she may have been and I just didn't know it was her eggs. I didn't think egg color changed. Is this a normal thing or does it mean she is lacking something in her diet?