According to OWAL, the cinnys and the black pastels are known for duckbill and kinking only in the super form. I saw a panda pied hatchling that had a 90 degree kink an inch behind the head. It is the animal that convinced me I would just never go there. I hatched a single badly kinked baby this year that needed to be put down and that was a breeding that was "safe". I hate to have to put animals down so to knowingly make a pairing that is known for a high deformity rate is just not my cup of tea.