Any current VHDF member may participate in VHDF sanctioned events. In order to enter or handle a dog in a VHDF test, the owner and handler must be a member of VHDF. There are no registry requirements as VHDF does not have a registry function. Any registered dog may be entered in a VHDF test. Registered purebred dogs will be classified within the VHDF database according to breed. Non-registered dogs may also participate in VHDF events and will be classified in the "Other" category.