No, it's just a harness. I was thinking what you said but wasn't sure if that would be OK due to the back/neck problem, but if not then I agree that a no-pull harness that is clipped to a loose slip collar would be the best option.Does the Ruffwear help to limit pulling? This dog is MEGA strong. Short little muscle bound dude.
My thought is to get some type of no-pull harness with a backup collar like you indicated above. If this dog were to get loose the owner would have major problems as he is quite dog aggressive. At that point I think the neck/spine issue would take a back burner.