There might be a legal benefit for making that change. If you haven't done so already, consider talking to an obscenity lawyer. If you are UK based I suggest Myles Jackman who would likely give you some free time and opinion, or ask him in one of his Q&A workshops. I am from the sex industry and we speak with him a lot about random questions like this as he is prepaid by the industry. There are really specific laws on erotica/ text based porn and drawings that are worth knowing.
Changes like Wargs might protect the project along with any art of the common animals. Again couldn't hurt to chat and see where the laws are... I know you aren't aiming for mainstream as a lot of this is too fetish fantasy for them to get, but, staying just right by the laws by a sliver might pay off later.
Thank you, playing this helped me actually understand more about many fetishes I didn't get, along with more clarity about sub-dom fantasy, and the power in erotica.