she's 9months and squeals a very high pitched squeal when frustrated or bored. I try my best to give her what she wants (she is very spoilt with toys) and I play with her as much as I can to stimulate her. Is it just teeth playing hell (she still hasn't got any yet) or a faze she is going through. How can I encourage her to stop it is not only giving me a headache but also receiving many dirty looks and eye rolls by others in public....help