I apologize for making this thread, I've looked into save editing and the wiki and I can't find how to get perky bunny ears, only floppy ones. Is it because they haven't been implemented to the game, or is it just that I haven't looked properly?
TiTS was built using CoC's code which was over time modified into what it is today. As a result, there are several distinctly CoC aspects that remain in the game, most prominently appearences from CoC transformations that have yet to be fully obtainable through TiTS means. Use a save editor.