@RIG
That’s more of a meta reason than a real reason.
Trixie, I’m sure would be jealous of her lucky breaks, and Moondancer, given how much she already worships Twi, wouldn’t need much convincing to ‘thin the herd’, so to speak.
This pic is bullshit, only sunset has an actual reason to hate her because her existence blocks her from ever appearing in the main show due to how insanely redundant she would be.