I have got a dwarf hamster who is about 1.5 years old. My mum said she would watch him while I went on holiday, when i came back I left him there for another 5 days as she was enjoying him so much. Anyway i went to pick him up tonight and when I went to put him in his ball he has lost alot of fur from under his stomach and it's up both of his sides a bit. My mum assures me that he has been fine the whole time we were away and she done nothing that she shouldn't have. I am going to make an appointment at the vets first thing tomorrow but in the mean time i have been reading up on the symtoms and it says it could be stress related and a number of other things. He seems totally fine apart from this so I am really confused! Has anyone else experienced this?