To best answer your question is that there are a few different lines of Calico or Sugar, for instance Flora and Fauna, Snakekeeper Sugars, etc. The VPI line was established by them from wild lines to my knowledge so the offpspring didn't come from another breeder..making them VPI line animals. When Pastels first made there appearance there were several breeders makeing there own line of them as well..Nerd lemons, graziani, bell, etc. It isn't a point of "pride" to list them as such, it's just labeling them as what they are. They are most likely all different variations of the same gene like lesser/butter or black pastel/cinny but even still they kept seperate to a degree and labeled as such.
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