If no one else has replied to your thread, then you can delete it. You should have a small box at the top of your post that says "actions", or else in the four small grey boxes you should be able to delete in one of those. If anyone else has posted, their comments will still be there as you can only delete what you have posted.
Ferrets: Contessa, Frankenfurter, Butterscotch. Kitties: Watson, Oskar DIP Sinnead, Vincent, Boris, Zeus and Athena, Willow, Mr. Frodo, Indie, Lucrezia, Judge, Odin, Miss Emily, Suki, Cody, Aristotle. RIP Herne, Ligeia, and Mr. Stubbs