I have 1 Americauna, 1 R. Red, 2 white Silkies, 1 Black Astolope, 5 Gold Star Comets. Most of them are 18 months old. 2 of the Comets and the Americauna are yearlings. All three babies started laying about a month (first of Aug.) They where laying light to dark brown eggs. My Silkies and Lop lay white eggs, the rest lay brown. Now, 3 days ago I found a Silkie sized egg in my laying boxes. However, this one was different; it was a Robin blue egg. Is this possible for them to lay different colored egg? After laying the same color for over a year. I know it was not one of the babies because it was to big. Thanks for reading!