nothing to worry about, they do that
ibd, i cant remember what it stands for though, one way to test is to lay it down on its back, and if it CANT correct itself, thats supposed to be a symptom
this is IBD:
http://www.youtube.com/watch?v=Y-IopSetZzw
http://www.youtube.com/watch?v=uqG6Y...eature=related