It's interesting that you say the colors were varied when you fed TCB and became uniform when you stopped. Maybe as an experiment I will stop using it as well and see what happens. I have to find something they like just as well though. They LOVE TCB.That is odd Steve. I observed that most took on a very strong orange color with color bits. I did have lighter ones in the group, but still orange in color. Now that they are not eating any foods that enhance color, they all look the same. I honestly didn't realize it until I ran out of the color bits and switched to an ON pellet.