Ok so this started a few weeks ago. It'd wake me up from a dead sleep because it's so loud. At first I thought the rats were rough housing really hard. But then I finally saw it. I have one female who I just don't even know how to describe it. She'll run at all sides of the tub just flipping out. I mean just throw herself against all sides of the tub, really heard and really fast. No rats are bothering her, nothing scaring her. She just appears to have a sanity leave. She'll ping pong ball herself against all sides then stop. She broke one of her nails the other day doing this and was bleeding a little. When the running at the walls thing is done she'll stop in a corner and her tail just twitches. She gets real still after this and just sits there staring off. I've come to the conclusions that I don't have much luck with rats. She's my favorite ratty but I'm scared she's got something wrong with her.