Yes i thought of this and Somehow i made a book about that deer and her adventures and how she got to equestria And how she got her first rampage and how she end up as a giant deer and ect… But i haven’t made the book in real life this something right to show how it began… So this is something i came in my head what if there’s a native human (in the modern world) who is part deer or believe she is trap in human body but then one day she finds a away somewhere in the forest and travel to equestria world you know… The world of taking ponys and ect… Then she realized is a deer all along and got her wish and the rest well… There well be more to explaining later in the future.