I don't mean to hijack the thread, but @Missy King, Dumerils are ambush preditors - that's why they burrow. Not because they are necessarily shy. Are you feeding live or f/t? They also sometimes like a bit cooler temps. What's the hotspot temp set at? It might be warm enough that they are trying to avoid it rather than make use of it. Lowering it a few degrees might tempt them to use it. These are just a few thoughts! I do not have a dumerils - I've just researched them a lot because I was interested in getting one and these are some things I took note of. Hope it is helpful!