Not to deliver it, but to take the package or envelope, check the address, then put it in a pile to go to a distribution center in the appropriate, proximal zip code of its destination. That done, the mail might wait up to a day to be flown out, two days at times, then another day to be delivered by ground.
Some breeds of dogs have a natural curl or bend to their tails. But others have been selectively bred to take this curl to an extreme, cork-screw shape. Dog breeds with curly tails referred to as screw tails include Boston Terriers, Pugs, Bulldogs and French Bulldogs.
Information on Canine Tail Docking. Tail docking is the surgical removal of part of the dog's tail. This procedure is most often performed in healthy puppies between 2 to 5 days of age. A similar procedure may be performed in older pets, but this is considered a tail amputation, not a tail dock.