She ran away from the people who were watching her come out of the shop
She ran away because her time as a human was running out
She was running away from the constricting life that she had lived before
Explanation:
Textual evidence below:
"Goodbye, then, and thanks," she said, rushing out of the shop, afraid that time was getting short and that people would stop in alarm to stare at her...she left the city behind her and simply fled...that first genuine leap on feet free at last, shaking her back and her tail, sniffing the air, the ground, the wind, and, with a howl of pleasure and joy, plunging off into the depths of the forest."
