To many, Fluttershy's gift - her way with animals - is simply an innate talent that she possesses. Perhaps they even think of it as a blessing from her Element? As far as Fluttershy is concerned, it's no blessing. Like any skill, it takes practice to achieve its full potential, and sometimes, as Rarity is about to discover, it pulls Fluttershy in directions that she is not always comfortable with exploring.
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There probably won't be a sequel.