I can't say I know much about the noises, but I swear rats DO have mood swings. One of my girls is the exact same way. Some days she'll be more curious and want to come out and play (I'm still getting them used to handling) and other days she'll run away and not want to come out at all. Usually I have to take their house (where they always hide) out before I can even get them to consider playing.carlylox said: