I have been breeding the same line of Darwin Carpets for almost 25 years. I have not introduced a new line in at any time. I bred siblings together this season with 2 clutches of eggs laid. The first clutch started hatching about a week ago. The first head to emerge appeared very orange compared to how they normally appear. Just thought to myself it was just a colourful hatchling, but when they finally all emerged I realised something funny had occurred. Some were normal, some really orange and 2 with no patterning at all.