Doberman Pinscher
While the tails of some working dogs are docked to prevent injury or infection, the tails of larger dogs commonly used for guard work or protection work (not to be confused with patrol work where a handler can provide secondary aid) may be docked to prevent their tails from being grabbed in a fight. This is most common in the Rottweiler, Doberman Pinscher, Bandog, Cane Corso, Boerboel, etc.