I got a vinegaroon about a month ago and I recently put more substrate and a giant rock in the enclose so he would have an easier time burrowing. Now he has burrowed all the way to the bottom of the cage through about 8 inches of substrate. Now what worries me is that lately instead of grabbing dirt from the bottom of the burrow and placing it on the outside of the burrow he has been just pushing the dirt behind him sort of like a worm would do. So now he has almost trapped himself entirely inside his burrow (not entirely). Is this normal and is there a point when I need to intervene? Thanks