Well we have had the little fella 48 hours now and I've seen him for less than 5 minutes he did a recy on his new domain then disappeared into the substrate. Thankfully after reading other posts on here I knew this could be the case so wasn't massively disappointed but oh its so hard knowing he's there but out of sight. I even came into the room at 1 a.m hopeing to see him because I'd been up to the loo (sorry if that's too much information) I heard him on his wheel so crept in without turning the light on but it went quiet and it was too dark to see if he was still out of his hidey place. At least he takes the food and obviously uses his wheel so I know he's o.k