“Also for some reason she couldn’t talk but would communicate with cricket-like chirps. She was very skittish and used to hide from the guy who bought her.
In the evening she would sit and chirp with the crickets outside cause she thought it was other changelings like her.”
Since the origin of the changelings is yet to be clarified in the cannon of the show (assuming it will be), we can all make our own theories about them. And, even if it is clarified and refutes theories, we can still call alternate universe and fire our head canons anyway.