The tail is animated with a random moving idle animation and five triggered actions:
Made this to complete an outfit I was working on but it's too cute not to share.
Enjoy!
TRY BEFORE YOU BUY!!
"wrap", "happy", "eeek" (alternative triggers: "omfg" and "scared")
"wild" (or "wildcat") and "fat" (or "fattail").
Longer versions of the last two triggers are "wild2" and "fat2".