I've had my hamster for about three weeks. I gave him a cardboard paper towel tube to play in. He used to be very responsive to taming and would climb onto my hand for treats, but now he just nests in or scratches at his tube. I never see him come out; I only hear him or see the evidence that he left the tube later. If I try to lure him out with treats, he just ignores them.
I'm worried that he's not exercising enough and feels uncomfortable, but I don't want to take his precious tube or force him out. What should I do?
