Okay - my 1 1/2 year old pekin female has developed a weird neck walk - let's see if I can describe it...it's like neck has a crick in it or that her head has been jammed down so she really doesn't have a neck....then when she walks she kind of bobs her head to the side. Does that make sense? It's hard to describe. She hasn't any injury or change in food/diet/eating habits/nor is she different in any other way! Any ideas?