[JeanKBBMMMAAN]

The bone structure is already there - that's why if you x-ray a dog during the neuter surgery, you will see signs of HD - which, with my 2 neutered males, has not changed the severity (mild) of the HD (not symptomatic) that they both had when x-rayed during their surgeries. He's had the biggest testosterone dumps into his system, and his testicles, joints, and ACLs are not more important than children, and all their friends (with the small addition of the reputation of the breed).

Combined with good, positive training that teaches him what you want and not just what he's doing wrong, it seems like a good plan, but most importantly, your son with the temper also needs to be trained, and worked on, and never left unsupervised with any dog, or you could have a very bad situation. Doing it the same way - showing him what you want, instead of telling him what he's doing wrong, lots of exercise to work out his ya-yas, and NILIF. Check out http://www.childrenssuccessfoundation.com/ for your son, the same things work on dogs (and adults!) and they have free materials on that website.