thank you for your advice! i have the substrate in a thinner layer over the uth for that purpose and he hasn’t been burrowing on that side (more towards the middle) so i don’t think that is the reason. one of the hides he has i am not sure if it is too big or not. when he is really squished and coiled up he takes up about half the room but sometimes he stretches out more and utilizes the whole space so i thought it was okay but maybe not. he also spends the most time in that hide during the day. should that hide be smaller?