Thanks Sarah ! A science would make my life a whole lot easier ! That's why I spend a lot of time sitting on a bucket watching birds in the sunshine.Sunshine will show up the 2 toned birds, the mealy ones, and if you look at wings and under fluff, the shafted ones.Then there's the little matter of TYPE.I would listen to her. I also understand that buff can be arrived at more than one way (while not disputing the Wheaten part at all). Making the genetics geniuses and calculators nearly useless for breeding them well. This is where thedragonlady's good eye is important. From what I've been able to understand, this is an art, not a science.