Tail docking removes part of a puppy tail for cosmetic or working purposes. The evidence base overwhelmingly contradicts cosmetic docking, while working dog docking remains more contested.
Tail docking for cosmetic purposes fails to meet any meaningful welfare standard. The procedure causes pain at the time of performance, and the tail serves important social communication functions whose loss impairs behavioral welfare throughout the dog life. The cosmetic rationale — conforming to breed standards — reflects historical preference rather than animal welfare. Working dog docking presents a more complex case: the welfare cost of docking must be weighed against the claimed (but poorly evidenced) injury prevention benefit. The evidence threshold for justifying a painful, permanent surgical procedure is high and has not been met by working dog docking research. The welfare case supports extending docking bans to all contexts, with appropriate evidence review for genuinely high-injury working roles.