My one surviving silkie of 4 feed store chicks does a weird thing. Occasionally, it weaves and shakes its head back and forth. It looks neurological. Is there something else I should be thinking of or worrying about? I am happy to keep it as long as it is living a good quality of life and not carrying something contagious. I can post a video later today when it stops raining. UPDATED: video in first comment below, in the first few seconds of clip.