We have a female hamster. She has a very large cage, food, water, clean cage etc but we don't handle her, she's sweet enough if we have to pick her up but clearly doesn't enjoy it (understandable for a small prey animal). She lives in the spare room out of the way of inquisitive toddler and cats although we see her when we feed her each evening.
Tonight I noticed that she has a fairly big bald patch, some hair regrowing in the middle, and what looks like dryer skin around the edges. She has lost a little weight recently but has started to put some back on. Any ideas what could be causing it?