I have a pastel YB double het albino pied, that has a white line appearing down his spine. The white area appears to be getting more defined the more he sheds. I think it started while I was away for a month helping my wife's 90 year old grandmother. I had a friend watching him, but when I returned there was a lot of broken shed in his enclosure. He is kept in a rack, on coco bark, with about 60-70% humidity, 90 degree hot spot and about 83-85 on the cool side. Any help would be appreciated. Please let me know what you guys think. Thanks in advance.

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