I'm not a huge Dash person (Scoot's better, imo but ANYWAYS), but Anthon is right. They didn't really try talking to her, it was more of a, "Let's talk about this behind her back, and come up with our own solution, that completely embarrasses her," rather than the five pulling her aside. If I were Dash, I'd be hurt, quite frankly. No one considered to tell me that I was being a jerk to my face, like a true, LOYAL friend. And I don't think I'm overstating the meaning of the method they took, either.
That one, and the dumb owl episode, I guess I like those two the least.