Hello again everyone! Recently, Paarthurnax has started to develop a bit of a habit. Every time I clean his cage, change the paper towels, etc, I always find that he had buried himself underneath the paper within 10 minutes. I know BP's burrowing is a common thing, and I was curious, because of this behavior, should I maybe switch over to a proper substrate? I feel like he might find a proper burrowing substrate a little more comfortable, if at the cost of me having to spend a little more time cleaning up his enclosure. He's in a plastic tub, currently, if that makes a difference.