after looking at the pictures what did you mean by pied??
sounds like hes just really stressed out i have heard from people that glass tanks can do that to a ball don't know if its true but it seem that way for my ball also don't know how the tanks setup but first one did that when after trying to climb to the top and fell a couple times and i took him to the vet and he broke his ribs there still messed up cause it was the first snake i had and didn't think about going tot he vet for a couple months so that maybe be something trying felling his sides all the way down and see if he has any not normal bumps.
just trying to help