Ok the ER was the right call. It's not dislocated and they explained that with shoulders they're either obviously dislocated or not. Her joints hyper extend so she just moved her shoulder out of alignment within the joint during dance. They did all the imaging in the ER and it's just soft tissue. Rest and ice. So even though she didn't get any treatment we left with greater piece of mind. We got a referral for an orthopedic doc but mainly to get a physical therapy prescription.
So two and a half hours later we're already sitting at Water Tower with our lunches!!
Thanks everyone!