Tracy.....
That is an undiagnosis and wouldn't cut it for me.
If I were you I would get a consult with a Neurologist.
There are no "early" signs...they either have it or they don't.
Ease your mind and get a second opinion..... if it is his back you need to do something about it now, not when it gets worse.
I will continue to :pray: for your handsome boy.