For the purposes of Dazzling Display, is a natural attack considered "wielded"?
"While wielding the weapon in which you have Weapon Focus, you can perform a bewildering show of prowess as a full-round action."
For a toothy half-orc, this would be a growl?
I think using the weapon as part of the display is wielding it. So yes, if you make a big deal about how sharp your teeth are and show them to people, they might get demoralized.