My questions are:
1.) Why do so many spider ball heads have that head twitch (genetics)?
2.) If you purchase a baby that does not show any signs of head twitching could it possibly start twitching later on in life?
3.) If you get one with a slight twitch could it get worse as it grows older?
4.) What is the correct terminololgy used for the head twitching?

This is my first post and I apologize if any of these questions have already been asked or if these are stupid questions. Thanks to everyone on this site who take the time to respond to me! Thanks again