I'm still trying to figure out how you're going to prove your dog worthy..... Obedience titles show mental soundness, and while not true to original standard, pulls can demonstrate drive as well as physical soundness. Participating in pulls also requires health screenings (which you have not stated you will be doing). Showing your dog shows that your dog is a good physical specimen and of correct type. While type may not be important to some people and can be abused in many breeds, I feel the APBT shows have remained true to form. Some breeders choose to breed for catch dogs, and test their stock that way. None of these arenas are the only ways to prove your dogs, but many feel they are good ways to not only keep your dogs mentally and physically healthy but also make sure you're breeding what you want to be breeding. PROVE to us that you will PROVE your dogs, but until then, no one here will take you seriously.