A lot of super blacks have spinal deformities and don't survive incubation (such as those in the picture). I am not aware that anyone has broken the code on how to avoid this other than to cross black pastels with cinnamon pastels. I don't like how brown they look when the cinnamon gene is added so I don't do that. Is it moisture, incubation temperature, something else? I don't know yet. Maybe somebody else does.
I produced a super pastel super black pastel (super super) last year that had the same problem.
Clean super blacks are getting hatched each season but it's a bit of a crap shoot.
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