Thank you all. I think Nugget knew I'd been talking about him as he emerged tonight. I've hardly seen him. Heard some scratching some nights but no sight of him. Tonight when I heard the scratching I went over to the cage - still no Nugget - suddenly he popped up from under the Fitch and looked right at me - with a pile of Fitch on his head
He has tunnels all over the place, even though the substrate isn't that deep.