The hair has grown back on Chatter's nub of a tail. (See older entries about why he lost his tail.) When a neighbor cat jumped over our fence, he puffed the hair on his tail out in defensive mode. My husband said it looked like a little rabbit tail.
Letting Arbee have more outdoor time has made her a happier cat. And she doesn't freak out anymore. It's easier to get her to come back inside. She has let go of another one of her feral instincts, but you still can't pick her up.