They've been blessed with good fortune after a deity took pity on their habitual misfortune. The side effect is that their hair and tail grow little seedlings that bloom and wilt every day.
The number of sprouts determines how lucky they are that day. They can gift the sprouts to a friend to give them a temporary luck boost, at the expense of their own. Additionally, their hair and tail resemble grass more than fur, and sometimes the wind makes them rustle like leaves in the fall. (It's very soothing!)
