Yes Anthony, their upper and lower jaws should be done as separate groups which should be children of the Nose. I would organize the PHI-File as follows: 1 hip xyz 2 Neck yxz 3 Head yxz 4 Nose yxc 5 LowerJaw yxz 6 LowerTeeth xyz 5 UpperTeeth xyz 5 LeftEye yxz 5RightEye yxz 2 Tail1 yxz 3 Tail2 yxz 4 Tail3 yxz 5 UpperBackfin zxy 5 LowerBackfin zxy 2 ShoulderFin yxz 3 ShoulderFinTip zxy 2 LeftSidepaddle zxy 3 LeftSidepaddleTip zxy 2 RightSidepaddle zxy 3 RightSidepaddleTip zxy May don't know if this curve option (which is used by the poser-horses tail) will also work for other animals. But if it does this would be cool anyway for all animal-characters with a lot of backbones.