i only heared about problems with the super-form, black pastel and cinnamon supers frequently have these duckbills, and in rare cases also kinking / spinal problems. So some breeders avoid producing the super-form, while other breeders have a few super black pastels and super cinnys in their collection. And perfectly healthy super cinnys are also possible.


but i have never heared about issues with the ones that have the gene only once.