I have 4 EEers so this may not seem odd to you, but I only have 13 girls. Several times I've gotten 13 eggs, only 3 green one ever. Last week I got 4 green eggs on one day. I thought that was really strange, but then decided that I must have just got some mixed up when I was putting them in cartons. Well it happened again today, and I know I didn't mess them up. I really got 4 green eggs. Can they change egg color? They are new layers.