Last I heard, everyone was struggling to fine tune SDXL on furry art too. The only community fine tunes that seem to have succeeded are ones aimed at taking things it was already designed to generate and trained on and making it actually good at those, or improving the aesthetics of its output.
That's mildly surprising, given how large and well tagged e621 in particular is. Though I assume most of the major furry art hosts are blocking scraping by this point, given how divisive GenAI is?
