I have a silkie that has started bobbing her head like she is dizzy or has vertigo. She walks well, eats and drinks, poop is fine and eyes are clear. no resp problems. I am concerned because we got her from a different breeder about a week ago and she just started doing this on wednesday. I have read about mareks and and cant find anything about cerebral hernia or seahorse syndrome on the internet. Are either of the later two contagious? I dont want the rest of the babies to get sick. Thanks!