It depends on your definition of work.
It's a poor stafford that won't kill a fox but that's not work.
The stafford that can scent one, follow a line, catch and then kill it is more like it. A dog that's hole ended or given a dropper isn't a working stafford to me. They can make half decent bushing dogs but they have their limitations. It's nice to see more lads taking an interest in them for bushing and what have you. Versatile little buggers.