I can't seem to find how you change this to the cow tail option?
Viewing post in Tail - VTS item (Smile tracked wagging) comments
i know this is super late and you may have figured it out but if you go into vtube studio go to settings where you make toggles and make a toggle for Live2d item action then look for tail wag item -Tail cow and just make the toggle for it something crazy so you dont accidentally press it and boom! cow tail!