She's a syrian, about 3 months old. No problems before now, but on Friday she developed diarrhoea, and now her bum is looking very mucky. She hasn't touched the food in her bowl for two days now, spending a lot more time than normal in her nest. The thing that worries me is a week ago I bought my friends old cage from her (because it was bigger than the one we had), it had been in her garage and had mice droppings in it. She said she had cleaned it out so I didn't clean it again before I put hammy in it - could she have caught something if mice had been in it? The only other new things in the last week were one of those hanging dried fruit stick things for the first time, which she stripped bare in two hours flat, and some tinned sweetcorn. Any ideas or advice? Thanks.