Hi, my almost 12 monthold did this two - I think it was about 9 months. We called it a 'potty strike'. If she didn't want to go, we just put a nappy back on her. ANd we also changed potties. She is now OK and happy to potty again, but if she does arch then I figure she is telling me she doesn't need to go.
9/8/11 at 7:39pm