I am starting to think it's a bit different then we originally thought. I gave mine plums until it gave the feathers message waited. It turned sylph green. I did the same thing again and it turned bone white. Did the same thing again and it went back to sylph green. Did it one more time to get bone white.

Current theory is there is only so many colors per feather change. For example 1 feather change using plums will only give you bone white and sylph green. If you do two feather changes in one feeding session it might put you into another color selection.

I did not continue the pattern I gave it some berries and it turned Celestial Green from Sylph green. This was only one feather growth. I gave more berries this morning until it gave the message. We will see what the next color is.