In the US there is the Fun Mouse forum, or here in the UK, Micearenice forum.
![](images/smilies/icon_smile.gif)
souffle is right, mice do suffer frequently from respiratory issues so if he`s been sneezing or making audible noises, some Baytril wouldn`t go wrong for a few weeks. But if his breathing is fine and it`s mostly hair loss around his nose area, it could be allergy or mites.