Hi Luna, thank you so much for your kind reply! I have been doing as you suggested and putting some more obstacles on the floor and Smudge seems to like that. His cage is quite enriched, there's a climbing rope ladder, a slide, a hammock and lots of tubes etc to play with, plus his little house and wheel. Actually this week he has seemed a bit more confident all of a sudden. I have moved him to the dining room to escape the heat a bit, and I thought he'd be freaked out, but he's been quite animated and social! Still flinching a bit but definitely improving I think... Hopefully some progress after all