I've put bones in this animal. There's an IK constraint at the tip of each toe. That's all. Why, when I lift the leg chain [I'm in the Left View] and try to shift it forward or back, does the chain twist in the air?

The joints are all Ball Joints, as per the Carrara tutorial. Should they be constrained to a specific axis?

Also, the movement of the leg seriously deforms the horns. This really surprised me. The head/torso/tail and all of both legs are one piece, done in the Vertex Modeler. But the horns are seperate and just grouped with the animal.

Any thoughts?