Until I had Alle my Boxer, I was unaware of how rare it is for her tail not to be docked. When she was a puppy I had so many people say how they loved her tail, or ask if she was a full Boxer which led me to learn what I could about Alle's Boxer Breed.
The docking term is referred to the living flesh of the tail, where the animal's tail hairs grow. Tail docking is the removal of a portion of the dog's tail. This is done by constricting blood supply to the tail with a ligature without anesthesia for a few days until the tail falls off. If docking is done later on when the dog is older it is considered tail amputation, which is done with a scalpel or surgical scissors.
