Is that normal? They are about 1.5 years old and I just bought them from a darling 13-year-old girl who raised too many birds (her parents put their collective foot down!) On that note, this is dumb but, how can I tell the difference between a dark and a light KC? I think I have one of each. One is the color of chocolate milk and one is the color of coffee beans. Clearly, one is darker and the other is lighter. I've read that light KCs lay more eggs. Is this slight difference in color indicative of different varieties of KCs? (I told you it was a dumb question, but I don't know if there's more to it than that. On its face, it seems too simple.) Thanks!