Source: https://civitai.com/models/643164/wolfychu-old-school-furry-design-for-pony-and-illustrious

Edit: I have finally decided to dip my toes into migrating my entire (currently published) Pony model to Illustrious (starting with this one)

I have noticed lack of dedicated lora for her old furry style for Pony so here you go

(I do recommend throwing in the "furry" tag otherwise this style can make a human version of Wolfychu instead)