Non-therapeutic docking of dogs' tails.
Holt PE, Vet Rec, 2006 Jan 28 - link

Tail docking in dogs.
Holt PE, Thrusfield MV, Aust Vet J, 1997 Jun - link

Association in bitches between breed, size, neutering and docking, and acquired urinary incontinence due to incompetence of the urethral sphincter mechanism.
Holt PE, Thrusfield MV, Vet Rec, 1993 Aug 21 - link