The kinking and duck billing in super cinnies and super black pastels is a known genetic linked issue. Any combo that has a supper of these morphs in the mix have the risk. This is not a husbandry issue. It develops during incubation in SOME of the super babies produced, but not all. It can rage from being as mild as to mostly being a cosmetic issue, to being as bad as, well, lethal, or very next near to. Problem is, you have no way of knowing which ones will get it or how bad. Some breeders will not risk breeding cinny to cinny, or black pastel to black pastel because of this (myself being one of them), others are willing to take that risk. I personally feel that knowingly breeding snakes with risks of crippling genetic defects is an unethical practice, but I'm not gonna shout at someone else who feels the risk is worth the gain. The choice is up to you, just be aware that if you breed these morph combos, you may be faced with the very real chance of having to put down snakes that would otherwise suffer pretty awfully, or keeping special needs snakes for the duration of their lives. You have to be positive that's something you feel comfortable handling.
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