Question: how does eeyore lost his tail?
Answer: Pooh informs Owl that he has made a Mistake, and in fact the bell-pull did belong to someone, and that someone was Eeyore, who was rather fond of it - attached to it, even. So Pooh picks up the bell-pull and takes it back to its rightful owner, and Christopher Robin helps out by nailing the tail back onto Eeyore.