moonshadow . It sounds odd doesn't it, a giant schnauzer being a 'working dog' ? After all, the schnauzer and the miniature schnauzer are both 'utility' breeds. The giant schnauzer was originally bred as a cattle drover but is now used as a guard dog and police dog. So the Kennel Club lists it in the 'Working Group'. That does not alter it's status for docking. Only a few breeds in England are eligible for docking and then only when the vet can be satisfied that the pup is to be used in one of the categories of work where docked dogs are still permitted (there's a formal procedure involving signed declarations from the breeder etc as well as a declaration by the vet). Most of the breeds are gundogs of one kind or another, but there is a possible exemption for dogs used in military work .
In any case a show dog can't be docked, 'show' being defined as a show which the public pay to enter, though a docked, exempted, working dog may be shown if it is being shown only in a demonstration of its working.