I read on here that it's totally normal as long as it's not like extreem, I have one that I've noticed it in but only between the tip of the tail and the vent. She was a rescue and the kid I got her from was like "WATCH THIS BETCHA DIDN'T KNOW A SNAKES TAIL CAN CRACK"...It happens but you don't want to force it on them or ever attempt to crack it for them. BTW I'm no expert whatsoever just saying what I've heard