breeding isn't an issue. I was planning on a male preferentially. I do like the look of the butter, they are a cute animal. I had heard the axanthic brown out as they age, I've been having trouble finding adult pictures to see how they aged. Though I've heard that some lines retain the black and white look, which is what I want, as they mature. I just don't know the difference between lines yet, I'm guessing it's just selective breeding for colors?