One of my silkies gets stuck on his back all the time. We got him at 2 days old and he is now 16 weeks. I think he has a neurological issue because he is always shaking his head (kind of like those bobble head figures). He is kind of the outcast in the flock and we find him off by himself most of the time. He can't get to his feet when he gets stuck on his back so we have to go looking for him to tip him back over. Any idea what could be his issue?