Usually tailed pit bulls are hard to come across. They cut off their tails. Docking the dog’s tail is the removal of part or whole. This operation in the first three days after the birth of a puppy, without anesthesia.
This practice appeared a few centuries ago. Its goal was to strengthen the dog’s invulnerability against a possible rival. Terriers for a shortened tail, as for the handle, was pulled out of the animal hole. In addition, the hunting dog has a short tail is less chance of the animal getting hurt while trying to Wade through thick undergrowth.
So, for some breeds docked tail became a requirement of the standard. Though in some States (Great Britain, Australia and many countries of Europe) this practice is forbidden by the law.