Mallow has become a lot more active since I got her the giant sized exercise wheel and my husband and I love to watch her play in it. My husband checks on her at night just to see if she's playing or not. Last couple of nights she's seemed to be sleeping like she did when we first got her (which is a lot of sleeping and very little "out" time) and tonight Jeff caught her curled up in her litter pan trying to sleep. Her digital thermometer reads 80 deg. so she's not cold and she has been sleeping burrowed into her pine shavings inside her igloo up until tonight's event. He was worried when he saw her curled up out in the open and oddly enough, in her litter pan. I checked her and she was grumpy to be disturbed and hissed and balled up a bit but once she smelled it was me, I could pick her up and check her. She seems OK physically so I'm wondering if this is normal hedgie behavior from time to time. Any input on this would be helpful so Jeff and I can sleep at night without worrying.