The tail does not have to be docked, but the docked Teddy not only looks good but also has a longer lifespan. People dock the tails of newborn Teddy dogs to: 1. Prevent the dog from being injured when going out and being bitten when playing with similar dogs; 2. Teddy dogs can hide their emotions after docking their tails , and it is not easy to be contaminated by external bacteria; 3. Teddy with a broken tail looks more delicate and beautiful.