Caught this one again with my daughter. I think the other ponies were trying to tell Dash what was up right after MMDW's first set of appearances, when they were in the restaurant. They were dropping some major hints. On the first watch, this is when I figured out it was all of them. I think they intended to tell her then, but Dash stormed out so they decided to push it further because she clearly hadn't learned anything yet.
